Chevy 350 Runs Rough Under Load

Chevy 350 Stalls When Put In GEAR This car has a 75 engine and was built to race has a total ford 9inch rearend and a ratchet shifter, the engine has a nice cam{whatever that means} sounds loppy any ways in neutral it will idle around 6-8 hundred rpm, when in gear it stalls. I ran that with iron heads for years on crap Cali swill 89 octane. Edelbrock 600cfm carb is 6 months old. There should be no obvious cracks or breaks. It runs very rough and seems to be backfiring through the carb. Just bought a '94 G20 Chevy van with a 350 TBI, ran great a few days then started stalling at stops. I originally used an old side marker light and mounted it under the A/C ductwork. Will a bad oil pressure switch/unit cause no power to the fuel pump and high idle in a 91 chevy Scottsdale c2500 5. Real-World Knowledge from Professional Technicians. changed temp sensor, ERG, cleaned and rebuilt the TBI, replaced all vac. I searched and found some threads mentioning this, but I didnt find any that metioned how to test for a bad harmonic balancer. tested fuel pressure - steady at 55 at idle, goes up a little. The engine is a 1969 350 chevy. My 1990 Chevy Silverado 5. Read more Ford reviews to learn about other models. Under a load on a hill it feels like I am loosing one or two cylinders. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. I have checked compression and pulled valve covers and all seems fine. my 99 chevy silverado 4x4 5. I got the engine timed to the 6 before TDC GM spec. 2-liter supercharged V8 that puts out an. Referred to as a "small-block" for its comparative size relative to the physically much larger Chevrolet big-block engines, the family spanned from 262 cu in (4. Basically what I notice is unless you really baby it with slow acceleration the engine kind of pauses and sucks in a huge amount of air any time you press the pedal in an assertive way. 97 silverado 350. 7 vortec that has been having a problem for about 6 months now. When I first start it up it runs around the 900 mark and then slowly drops to the 500 mark in park. 7 Idle surging,stalling in the alt. Many modern vehicles have eliminated carburetors in favor of direct fuel injection controlled by a computer. The 2500 HD has an impressive maximum towing capability of up to 18,510 lbs. If I'm in park and mash the pedal the engine will hesitate a little but will rev up. Select your vehicle make, Year, and model, to see a list of products that fit your specific. Car would not run properly in driveway. Q: When I use my car it idles at 700 and then stalls when used for 5 min but there are no check engine lights. The fan runs a bit to cool off the system and it's perfectly normal. I read it and it was a P0300 Random/Multiple Misfire. Run the engine at a high idle for about 10 seconds. cuts out under load. dragonflyoffshore. If your engine starts operating in a manner that gives you the perception of “running rough”, it is likely due to a handful of common causes. 55-66 stepside bed. started it up and idled it up to around 2500 to blow it out. (It's much colder today 58 opposed to 77). Actually, this is the world's longest continuous use vehicle in production, starting from 1933 till present days. Going to try engine/plug. I have changed fuel filters, put Sea Foam in the gas. In an ATC vehicle, they are only limited by what they want to do, not what they can do. Make: Chevrolet. 75 inch bore of the 1955-1957 265 CID V8 which was the first small-block Chevrolet V8. Found no spark. Feels like electrical to me, but who knows. Tested; vacuum, fuel pressure, OBD 2 scan. It was a reliable straightforward engine that came to fame mostly due to the fact that was offered alongside the Chevy 230 inline 6 in the all new Chevrolet Camaro. Fuel filter is new, 350 engine, throttle body injection will chug and miss under load when engine warms up but runs fine at idle. (201 people reported this problem) RepairPal Fair Price Estimate. As soon as I shift the car into drive it wants to die. ATK High Performance Engines. Discuss 1990 TBI 5. Bad o2 sensors, clogged catalytic converters and a host of other failures can cause those symptoms. If you have the throttle just barely open it will smooth out until it upshifts then it. Advantages of Correct Tire Inflation Maintaining correct tire inflation pressure helps optimize tire performance and fuel economy. Learn more about how horsepower affects performance, or explore hundreds of other calculators addressing topics such as math, finance, health, fitness, and more. 2005 Chevy 3/4 ton crew cab duramax diesel 4x4 1988 GMC Sierra K 3500 Bucket Truck. If I'm in park and mash the pedal the engine will hesitate a little but will rev up. American Auto Wire. Having a a major dilema with a rough idle / Multiple Cylinder Misfire on my 2001 Chevy S10. 3 Diesel W/ Dew-Eze bale bed. it used to run just fine, but slowly over the course of a couple months it ran richer and richer. Car starts on a dime and drives great for about 10 mins just all of a sudden just bogs down and idles really low then finally stalls. 7, Everything is stock, have never had a problem. Under load she misfires but runs great otherwise. 7L 350 is difficult to start (hot or cold), and runs rough at idle and under acceleration. It does it sometimes at idle when cold and does it just going down the road at 40-45mph when it gets into overdrive and is running in the 1500RPM range. It run good but when you take of it seems like it lose power. Advantages of Correct Tire Inflation Maintaining correct tire inflation pressure helps optimize tire performance and fuel economy. I have to let the pump run 30 sec before I start it. Research the 2017 Chevrolet Silverado 1500 at cars. the RPM is Okey when i “start” the car, however when i push the gas to start driving, the RPM goes up to 4k and 5k and the car does not run or runs supper slow (an RPM of 5k with a speed of 5MPH). Stalling out under load. Get In the VAN!!! Suburban and SUV. UMI Performance. my 99 chevy silverado 4x4 5. A shorted diode in the alternator can still allow a charging voltage of up to 13. 3/4 ton, 350 TBI engine with 125,000 miles. An air filter cleans the air entering the engine and prevents debris from entering the engine and causing damage. Towed to dealer and mass airflow sensor (MAF)replaced 34000 mi 3. either email me at [email protected] My 350 engine idles very rough, as if some cylinders were hitting harder than others or some are intermittently missing? Just above idle the engine smooths out and performs well. The leak was there when the head gasket went. 4L runs with an intermittent roughness. You've got one bad hole, and now this knock under load. 7 vortec engines. If the plug wires are OK, remove the cap assembly and check for moisture, cracks, chips, or carbon tracks. If this happens, charge the battery out of the car to confirm it is still good. Why does a 1993 Chevy pickup with a throttle body injected 350 run rough just off idle or under almost no Could the O2 sensor cause the carb to load up on my 1994 Chevy pickup with a 350. Body style: truck. Transit 250 and Transit 350. Tin sort of a sound. I am still running a 6 volt system. So if torque is what you're after, "there's no replacement for displacement". if i stop for a snack get back in my truck and start it same problem for 3-5 min. No truck is perfect. recently had a power issue with the engine that was in my boat. From Chevy — the most dependable, longest-lasting full-size pickups on the road. It is worse when under load. Under normal accelerating, the car seems fine. A low oil level can cause engine ticking noises as valvetrain components aren’t getting the proper lubrication and start to get noisy. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. You're whole post scares the shiza outta me, lol. How Upgrading to Heavy Duty Leaf Springs Changes Your Vehicle's Ride If your leaf springs have worn out before you expected, you might want to think about upgrading to heavy-duty springs rather than just replacing what you have with the equivalent product. 350 chevy sputters under load in higher gears. What kind of honest mileage is anybody getting while not towing? Any common mechanical problems? I know this won't get the mileage of a 5. The engine idles a little rough and the cel is on. My 1986 Silverado C10 with a small block 305 is having a weird misfire issue. No worries. Thankfully, because both of these components are on top of Chevrolet's 350 small-block engine, checking them is quite easy. the RPM is Okey when i “start” the car, however when i push the gas to start driving, the RPM goes up to 4k and 5k and the car does not run or runs supper slow (an RPM of 5k with a speed of 5MPH). Off idle and during acceleration it runs fine. Soooo, anything that affects engine vacuum, can tell the MAP sensor the wrong information. See all for sale. Any idea of what may cause the running rough? Thanks, jtcom. Compression on the new engine is at the high end 170 to 175. Here are some: Stalls at idle, stalls when I put the clutch in, stalls when I turn a corner, misfires, surges, no power, cuts out, no power at top revs, runs rough, etc. I even changed the jets and metering rods twice to lean it out, but it still ran really rich. Initial problem was the infamous hot start issue that gradually got worse. Find great deals from top-rated dealers TM. Run engine until normal operating temperature has been reached and then allow to idle. As the title says, my 2007 Acadia with 85k miles has been vibrating under load when accelerating around 1500-2000 rpms. The engine runs fine when cold but as it warms up it starts to "surge" at idle and when you come to a stop it acts like it wants to stall then it grabs. I replaced spark plugs as the problem occured while driving. Doorskin repaired but needs some help. It should be regarded. So, this kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air. Would crank normally but not start. Average rating from 5,040 customers who received a. I have a Chevy K1500 sierra with a 350 that is not EFI. tested fuel pressure - steady at 55 at idle, goes up a little. Most auto repairs shops charge between $75 and $150 per hour. of the time it's. Lately it has been lugging, spitting and sputtering pretty bad and only getting worse. Will idle about 1200 RPM, but has that small miss. My problem is it has a rough idle and it is hard to start. I rebuilt the carb (not the problem) Replaced fuel filter which was not plugged. (That's what it sounds like but no flame). It started with the engine light being on for a while, with a slightly rough idle but otherwise ran great. Lifestyle – practical, affordable and sexy. iATN TechHelp is the heart of our network. I have tried 1/2 can seafoam and let it set for about 20 minutes. A properly-operating engine should run smoothly and without excess noise. Shop millions of cars from over 21,000 dealers and find the perfect car. Well I checked timing first, and the timing mark is way off. If the fuel vapor purge solenoid is open and not in its normally closed position fuel vapors may enter the engine during fuelling which will “flood” the engine. 028 results in minor pinging, but no hesitation or surging. The engine may only misfire and run rough when cold but then smooth out as it warms up. This is to burn unspent fuel which helps the emission system work better. If the EGR is disconnected on a stock system the engine will ping, the knock sensor will detect the pinging, the ESC will retard the timing to stop the ping, and the truck will hesitate, get poor mileage and lack the power it would otherwise have. Feels like electrical to me, but who knows. Over a long period of time the higher combustion temperature can cause valve damage. com or post back. Connect the vacuum gauge hose as close to the intake manifold as possible and start engine. Every engine needs clean air filters, fuel and the proper cylinder firing to perform at its peak. Probably only need the. Kodiak & Topkick Forum. I have a Holley 650, Excel ingition, mild cam, TH350 tranny. That's a long story from when my project began. Ride along with a family as they use. Rough Shifting or Lack of Response. 3 v8 gas has a very rough idle, and stalls at low manuver speeds like turning at low speed or backing up. Rochester carburetors were quite possibly the most widely used carburetor in the twentieth century, with over one million units produced by the Delco Carburetor Company, a division of General Motors. We tried a known good quadrajet off another car that was running fine and it still did the same. Recently rebuilt the 454 in my 1990 TBI Burb. Discussion Starter • #1 • Dec 18, 2013. I would say between 2nd and 3rd gear. Replaced: 1) Replaced the coolant temperature sensor 2) Replaced MAP sensor 3) Checked the throttle sensor response is as required 4) Checked the O2 sensor via propane torch test, checked fine 5) Replaced the Fuel Filter 6) Checked the. When outside temp. Retractable running boards. I have a 1994 chevy 1500 , 5. next on my list to check is first the ESC or if the timing chain slipped a tooth. I have a 1978 chevy 350 thats starts fine, and idles good. I have repleaced the plugs, wires, rotor, cap and so on still the same thing. There is no doubt that our Chevy 427 ci turn-key crate engine is a favorite for the true Chevy man. It only takes a minor problem like a fouled spark plug to cause. SOURCE: 99 chevy silverado running rough and stalling. vacuum when idling. Asked in American Cars , Chevy S-10 , Chevy. To troubleshoot a Chevy 350 engine expediently, you must figure out if the problem is the ignition, electrical, fuel or mechanical. I can drive it around the neighbo. 7 350 engine 183,000 miles. real irrating in the city. Please ONLY CALL 1-306-442-9999 (landline) if you are interested or want to know more. Used Cars for Sale. 1959 Chevrolet Apache 36 Pick Up Fleetside! Red with Black Interior! 1959 Chevrolet Apache. Needless to say, I pulled the transmission, flexplate was fine, so I replaced the entire transmission with one of half the miles. 3 V8, Chevrolet, Cadillac, Buick, and GMC, 8 replies Lincoln Mark VIII hesitation, Ford and Lincoln, 8 replies Where can I find info on the 1988-1998 Chevy pickup truck V8 engines?, Automotive, 2 replies Fuel mileage Chevy pickup, Automotive, 4 replies. Have not changed plug wires or coil in HEI, but plan to change wires this. Average repair cost is $1,370 at 142,150 miles. Fuel pump replaced about 30,000 miles ago with a Delphi unit. 7L TBI - Rough Idle/Stalling by AKupNorth Apr 10, 2018 12:56PM PDT (Let me try again. Not sure if boats are same, but should be within a couple deg. Truck idles fine but once put into gear and a load is put on the engine, it begins to sputter, choke out, and eventually stall. Changing the plugs did not solve the problem. hey guys, i recently aquired a 91 chevy C2500 with a new rebuilt 350 tbi. Whether you're looking to maintain, optimize, or upgrade, we offer competitive pricing on Dee-Zee Rough Step Running Boards (Black) - DZ15321S for your Truck or Jeep at 4 Wheel Parts. You're probably going to need to turn the torsion bars up for 285s. Feels like electrical to me, but who knows. Compression test, all within 10 pounds, 160-170 psi. Set the pull-off so the choke is a little tighter. 60 valves, Edelbrock. That’s a long story from when my project began. 2003 Ford F-150 50,000 mi, At Idle my F-150 5. What would be wrong if a 1989 Chevy G20 van 350 motor runs good but has no power? The timing is too low or it has the wrong spark plugs in it. sputter, idle, hesitation, SOLVED!!!!! Tuesday, August 12, 2008 2:00 PM. 97 silverado 350. Re: 355 chevy heads, poopy stock VS edelbrock performer heads 350 with flat tops and 64 cc heads is still under 10. That will introduce a bit more air without changing cam timing so HP and torque will increase. 5-inch polished forged aluminum wheels (F-450), and cruise control. Engine started fine, revs fine in neutral but once over 3000 revs in gear loses power under load. 55-66 stepside bed. As soon as I shift the car into drive it wants to die. navalavi8or Posts: 5. 7L (350CI) Throttle Body Injected automatic with 126,000 miles. I am trying to tune out a hesitation in the off idle part throttle range. This happens ofter when pulling up a rolling. If the car is race-only, do the same thing around the pits or on the return road. Jul 23 2011, 9:41pm. I can get it to start but. Add style to Super Duty ® toughness with these features: bright chrome grille, chrome front and rear step bumpers, STX fender vent badge, as well as 18-inch cast-aluminum wheels (F-250/F-350 SRW), 17-inch polished forged aluminum wheels (F-350 DRW) or 19. If the noise disappears or lessens substantially when a wire has been removed, that cylinder will be the likely suspect for a bad rod bearing. I referenced an 89 Chevy R3500 because I already own one. Sometimes a car will refuse to change gears or just won’t shift smoothly. Published Jul. by Kyle McFadden. Chevy/GMC 1500 Pickup 5. Well, I have been having the same problems that many of us on here are having with an iradic idle, hesitation under load, and sputtering up to like 3000 rpm. Overall, I'm very pleased with the product and the assembly. See our vacuum ports. Start your weekend off with a laugh on us! By Jerry King - February 14, 2020. I own a 85 El cameo with a 350 Chevy in it many Tahoe's have a like engine. Find 757 used Chevrolet Chevelle as low as $29,995 on Carsforsale. Data disappeared!) As some of you may recall, original problem was a Code 42 that was finally. First off when i got the car running i had the timing light ready so i could check / set the timing to around 10-16 deg BTDC. when i start my truck in the morning and drive it without letting it warm up i stall when comming to a stop and turning. Select your vehicle make, Year, and model, to see a list of products that fit your specific. then if it doesn't run under load, you have other problems. Run engine until normal operating temperature has been reached and then allow to idle. and when i keep my foot in the pedal it doesnt clear up engine is mild 350 with h. It doesn’t have to run very long as this is just a. Add style to Super Duty ® toughness with these features: bright chrome grille, chrome front and rear step bumpers, STX fender vent badge, as well as 18-inch cast-aluminum wheels (F-250/F-350 SRW), 17-inch polished forged aluminum wheels (F-350 DRW) or 19. Chevy Silverado Engine Ticking Noise I’ve heard many complaints from customers, in person and online, about a ticking-type noise coming from the engine on their Chevrolet Silverado. One carb may fit several applications. blakestree: The procedure that you are referring to is (IMHO) achieve the initial hydraulic lifter preload so that you can get the motor running then do the final preload adjustment with the engine running. com or post back. I've been having problems out of my 1995 Mercury outboard [accelerating under load]. It's been doing its thing for 40 years on my '70 L48 350 Monte Carlo--forever known as Project Econo-Performer (Super Chevy, circa 1979-1990). Used 2015 Chevrolet Tahoe for Sale on carmax. McGaughys also has some of the highest quality SUV lowering kits and McGaughys Drop Kits around! McGaughys now offerst SUV lowering kits & McGaughys Drop Kits for most of the popular SUVs and they are available in 2/2", 2/3", 3/5" and 4/5" drops! Making McGaughys lowering kits the #1 choice to drop your Chevy, GMC, Ford or Cadillac SUV!. Diagnose rough running chevy R10. Replaced: 1) Replaced the coolant temperature sensor 2) Replaced MAP sensor 3) Checked the throttle sensor response is as required 4) Checked the O2 sensor via propane torch test, checked fine 5) Replaced the Fuel Filter 6) Checked the. Fuel filter is new, 350 engine, throttle body injection will chug and miss under load when engine warms up but runs fine at idle. My truck (1990 Chevrolet 1500) now sits for extended periods of time. The second- and third-gear pull results were in remarkably close agreement: Horsepower at the wheels came out at roughly 395 hp at 6,250 rpm with torque at just under 350 lb-ft at about 4,300 rpm. If this happens, charge the battery out of the car to confirm it is still good. GM developed the engine by increasing the bore of the Chevy 265 V8 which was first produced in 1955. no load - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. Advanced users would also find this manual very handy. Classic Performance Products. I pulled my engine sbc 350. Chevy 350 is backfiring/misfiring through the exhaust? It starts just fine but at an idle but smells like it is running way rich and when you rev to about 1700+ it starts to make popping sounds in the exhaust but stops when you bring it back to an idle. The engine has a little over 500 miles on it. 6:1 Edelbrocker performer RPM air gap intake Idling in neutral it sounded ok but under any load it. Also put AC Delco 100k mile plugs in just to be sure Autolites werent playing nice. 215,000 on the truck, 40 or so on a GM crate engine. Pumped 12 gallons of old fuel out (all of it) and put 2. Engine starts vary poorly will not idle and then shuts off, and it smells of heavy gas fumes in the exhaust. Designed by Ed Cole's group at Chevrolet to provide a more powerful engine for the 1955 Corvette than the model's original " Blue Flame" in-line six, the 162 hp (121 kW) 2-barrel debut version went from drawings to production in just 15 weeks. I have a similiar problem as devin, my 95 Sierra 4x4 it has a 350 5. I took off the transmission to work on the rear main seal. 0L Turbo-Diesel helps Silverado offer up to an estimated maximum highway range of 668 miles †. Replace HEI distributor and no start. 7 vortec engines. The 283 was manufactured with several different carburetor setups such as a single 2 barrel, a 4 barrel, a 2 x 4 barrel setup and an impressive fuel injected model. Finally got my SBC 350 running again from over the winter, Now that i have it running i have some weird problems. Listen for any change in the clunking noise. No real mods (K/N, Flowmaster exhaust). When staring with a cold engine it runs fine but, as soon as the engine warms up to operating temp (only a couple of minits) it will hesitate/stumble around 1200 to. It’s a nice little cruiser and not really a hot performance engine. There were. My vortec 350 starts right up idles fine and accelerates only as long as I stay under 2000 to 2200 rpms. As for jetting, on a new carburetor, the first thing is to see if the jetting is even in the ballpark. Here is a list of the top 10 reasons why your check engine light turns on. 7, Everything is stock, have never had a problem. 7 Vortec 180,000K. Joined Aug 27, 2011. He still thinks that the cam may be off a tooth or two therefor not allowing the engine to stay running under a load. NOTE: This tutorial covers the EGR valve of the 1987-1995 throttle body fuel injection (TBI) system of the 4. Start at 4:51 if your in a hurry for a solution. This case study is on a 1996 Chevrolet Blazer with a 4. I just bought an Alpha 1 kit car with a 350 SBC and TH400. I am having a terrible time with getting it to idle smooth. Runs just as rough at idle or higher RPMs. Basically what I notice is unless you really baby it with slow acceleration the engine kind of pauses and sucks in a huge amount of air any time you press the pedal in an assertive way. Replaced the engine and it starts and runs fine, until you drive it under load. I have tried 1/2 can seafoam and let it set for about 20 minutes. I rebuilt the carb (not the problem) Replaced fuel filter which was not plugged. Featuring an Eagle forged stroker crankshaft, SRP or Mahle forged pistons, and performance aluminum cylinder heads, this Chevy 427 ci crate engine, pumping out a whopping 550+ HP, is certain to leave most Ford owners in the dust. i got it running, changed points & cond adjusted the quadrajet, timed it by ear to start warm with 1/2 crank but it sounds like its missing a few cyls. Additionally, the 15-passenger models were only available on the 350 platform. The complaint on this Blazer was that it had a misfire that was bad enough to make the tach jerk. Started stumbling at low throttle, stalling when I came to a stop or any low rpm activity. No codes on the OBD. American Auto Wire. A nice, clean vacuum signal helps transmit the necessary information, so the more vacuum the engine makes at idle will help the system self-tune easier. It used to chirp the tires a little. My problem is it has a rough idle and it is hard to start. 350 engine. Finally figured. replaced computer and coil and checked the timing and still same issue. I have a rat rod 55 - 66 stepside bed. I just bought an Alpha 1 kit car with a 350 SBC and TH400. Engine stalling problems can be hard to find and are often sensor or temperature related. iATN TechHelp is the heart of our network. Chevy Silverado Engine Ticking Noise I’ve heard many complaints from customers, in person and online, about a ticking-type noise coming from the engine on their Chevrolet Silverado. (That's what it sounds like but no flame). Next while the engine is still warm drain the oil and change the filter. By Patrick Rall - February 21, 2020. Well, I have been having the same problems that many of us on here are having with an iradic idle, hesitation under load, and sputtering up to like 3000 rpm. Surges and sputters when accelerating at low speeds, 20 -35 mph, runs rough as if it is missing at low speeds. 7l is a pretty bare block with little electronics but it has headers and an Edelbrock intake and carb and a Delco HEI Distributor. IAC valve? The AAC valve increases the engine idle speed until the engine warms up and then the IAC is supposed to take over, provided it's clean, working properly and the manual idle speed adjustment is set low enough to allow the IAC to control the engine idle speed (should be about 675 rpms with the engine fully warmed up, the transmission in D and fully stopped with your foot on the brake). First post for me. Conversion $ 28,995. Our commitment to providing the best parts at the best prices is topped only by our dedication to providing the very best service to our clients. Fuel pump replaced about 30,000 miles ago with a Delphi unit. The oil pressure guage is tacked out. without turning runs fine until i turn it off again. Has HEI dist. 7L (350CI) Throttle Body Injected automatic with 126,000 miles. Engine starts vary poorly will not idle and then shuts off, and it smells of heavy gas fumes in the exhaust. 93 Notchback 5. I ran out of gas last week. Before narrowing it down. next on my list to check is first the ESC or if the timing chain slipped a tooth. Many modern vehicles have eliminated carburetors in favor of direct fuel injection controlled by a computer. I read it and it was a P0300 Random/Multiple Misfire. Chevy SUV & Crossover Tech Forums. Re: Lashing the valves on '99 350 vortec When we used to run the valves in the race car I was the guy in the dirt on crank shaft turn duty. Finally bought a code reader and found bank 2 sensor 2 oxygen sensor bad and a cyl 5 misfire code. However in terms of high-RPM function, it falls well short of ideal. Would crank normally but not start. When outside temp. 7l is a pretty bare block with little electronics but it has headers and an Edelbrock intake and carb and a Delco HEI Distributor. I originally used an old side marker light and mounted it under the A/C ductwork. 71 chevy with 350 engine, edelbrock intake and 600 cfm carb setup, new HEI distributor put installed, 8mm spark plug wires. Soooo, anything that affects engine vacuum, can tell the MAP sensor the wrong information. I am sure it is low with all the wear, but it still had a lot of power. 5 LB7 Forums. Find a high quality auto repair shop or dealer. It is definitely worse under load. 7, Everything is stock, have never had a problem. Not sure if boats are same, but should be within a couple deg. Chevy/GMC 1500 Pickup 5. The Chevrolet truck ignition switch problem is commonly found on two separate generations of Chevy pickup trucks and sport utility vehicles. Running rough under load like plowing, it idles ok but it start to cough, and buck under load. navalavi8or Posts: 5. trying seafoam again and I am letting it set overnight now. 2010 Ford Escape 2. 3/4 ton, 350 TBI engine with 125,000 miles. done a full tune up. Can someone please help with what I should check next, I have a 1998 Chevy K1500 5. One carb may fit several applications. I never noticed the rough idle before, and it certainly did not "stutter" while driving before. I - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. I have repleaced the plugs, wires, rotor, cap and so on still the same thing. 5 LB7 Forums. The "soft" misfire, often called a surge, is commonly associated with fuel related issues. The "sharp" misfire, on the other hand, frequently relates to ignition problems. The 2020 Lexus RX 350 ranks in the top half of the luxury midsize SUV class. Now when its cold it runs really rough coughing and sputtering. Finally got my SBC 350 running again from over the winter, Now that i have it running i have some weird problems. It does not run a computer. it will run while fluttering the pedal but that is all. either email me at [email protected] sputter, idle, hesitation, SOLVED!!!!! Tuesday, August 12, 2008 2:00 PM. changed both injectors, seals and gaskets changed the TPS, IAC, MAP, and ECM engine runs now but doesnt stay running, idles rough. Chevy 350 is backfiring/misfiring through the exhaust? It starts just fine but at an idle but smells like it is running way rich and when you rev to about 1700+ it starts to make popping sounds in the exhaust but stops when you bring it back to an idle. 61 Great Deals out of 4,381 listings starting at $19,590. RV with Chevy 454 engine problems: Mark: 9-9-09 : I have a 1986 El Dorado motor home with a chevy 454. The Bosch sensors have caused rough idle and surging problems for me and other people. Myth 6: There is a specific #1 terminal on the distributor cap. If you find that you have a low oil level, consider adding an oil additive such as BlueDevil Oil Stop Leak as you top off your engine. 3 v8 gas has a very rough idle, and stalls at low manuver speeds like turning at low speed or backing up. I have a Chevy K1500 sierra with a 350 that is not EFI. Stock 327 chevy, no modifications to drive train I know of Turbo 350 Tranny non-lockup out of el camino (seriously doubt this is the problem) Stock Rochester Carb, NOT A QUADRAJET, it's an old 4gc four barrel model pre-67 Aftermarket full length headers I'm racking my brain trying to figure out what the hell is wrong with it now. The problem occurred on re-start, not while driving. Probably only need the. Hello everyone, Im new to the forum. Different owners seem to describe this problem using a variety of expressions. was running just fine, but now will not idle at 800 RPM. causing the engine to load up with gas dumping. 350 tuning problems. 7L GM engines. It’s hard to tell if a filter is clogged, so it’s best to replace at each tune-up. The system provides a structured way to receive help for free, in exchange for offering your own help in return. It's about 2-3 inches BTDC. Has a quadrajet carb, new fuel pump and filter, new points, condensor, new coil. I originally used an old side marker light and mounted it under the A/C ductwork. 55-66 stepside bed. Normally it idles around 950-1050 RPM, what has been happening is that it would start, idle high, around 1500, then drop to normal, and then start sputtering and RPMs would fluctuate anywhere between 750 on the. Have replaced spark plugs, had starter and battery tested. In fact, it was Chevrolet's toughest truck made, and remains so to this day. Many people probably just ignore the check engine light when it comes on, but it can be triggered by a number of issues. Lately it has been lugging, spitting and sputtering pretty bad and only getting worse. For some scan tools enter VIN 10th "L" 3rd "C" 8th "K". Tighten it until the clatter. Includes: Plain Premium Black or High Carbon Alloy Rotors and Posi Quiet Premium Pads. Any idea of what may cause the running rough? Thanks, jtcom. 1993 Chevrolet C1500 / Rough idle but otherwise Rough idle but otherwise runs fantastic to see if you solve the problem with irractic idle but runs perfect I have the exact same issue on a 94 c1500 with 350. The engine misfires or runs rough when it is fully warmed up at constant speed or stopped and really bad when pulling a load up a hill or when power breaking. 5-05 LLY Performance Parts Discussion. 01-02-11 12:41 PM - Post# 2025792 In response to strictlygm To run well without EGR you need a custom chip/tune. Symptoms----cold drive-ability, bucks @ part throttle, worse under load, backfires, belches black smoke(you should see my tailgate ) Timeline and service related incidents--- Little over a year ago, it quit a couple times---I mean locked down like the key was switched off. Also, it may run fine most of the time but suddenly misfire or cut out for no apparent reason. The engine idles a little rough and the cel is on. The engine runs fine when cold but as it warms up it starts to "surge" at idle and when you come to a stop it acts like it wants to stall then it grabs. Rochester carburetors were quite possibly the most widely used carburetor in the twentieth century, with over one million units produced by the Delco Carburetor Company, a division of General Motors. If you find that you have a low oil level, consider adding an oil additive such as BlueDevil Oil Stop Leak as you top off your engine. So i have a chevy 350 i rebuilt recently and have put about 50 miles on it and it ran great. Oil Leak Diagnosis. about 2001 and older are equipped with a air injection system that is fed into the exhaust system when the engine is under load. It runs up fine is you don't hammer it from Idle. 2 Hesitation & Stumble. I have a 2000 silverado z71, with 288K, recently replaced fuel pump and filter about 3 weeks ago, was running great, until last week when it started to hesitate bad and back fire under acceleration, it ran good in idle and underload until is warmed up then when you tried to accelerate it would bog down bad and start popping like tiny backfires and the more gas you give it the engine falls flat. 7 350 engine 183,000 miles. I have a problem with a 98 Chevy 4x4 5. This is where thousands of automotive technicians from all over the world exchange information and ideas, 24 hours a day. and ECM engine runs now but doesnt stay running, idles rough. Just bought a '94 G20 Chevy van with a 350 TBI, ran great a few days then started stalling at stops. I am sure it is low with all the wear, but it still had a lot of power. If your timing is off or not advancing as rpms go up, then under no load you may not have any issues. Recently took the car out and developed a rattle/Diesel sound to it. If the noise disappears or lessens substantially when a wire has been removed, that cylinder will be the likely suspect for a bad rod bearing. Different owners seem to describe this problem using a variety of expressions. I - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. When cold, started up perfectly. 7, Everything is stock, have never had a problem. All bead blasted and in primer to protect the metal. I searched and found some threads mentioning this, but I didnt find any that metioned how to test for a bad harmonic balancer. Before it ranged from 300-350. $88 - $111 Learn More. Myth 6: There is a specific #1 terminal on the distributor cap. Really bad after 1st. 454 Runs Rough. If you sit at a light for more than a few moments it will start to idle lower and lower until it stalls. Caution! The only time you can safely run an engine with an open throttle is when the engine is under a load. when i drive around town. Chevy silverado 5. Loss of power. It is a 91 chevy truck with the 350 (5. Initial timing is 10-12 Deg Full(total) timing is 22 deg I don't think the Vacum adv is working (New vac mod) Idle is set at about 600-650 RPM ( Guessing!! no tach) Any thought Oh yeh it will fire through the carb. Assuming your 350 has the stock cam , a Holly 600 will do it good. Whether you're looking to run larger tires, give your vehicle a more aggressive look, or achieve outstanding performance on the trails, Rough Country has the right lift kit for your Jeep, Truck, or SUV. Overall, I'm very pleased with the product and the assembly. com or post back. 1983 chevy C-20 305 ci. Chevy silverado 5. navalavi8or Posts: 5. Had recently filled up and thought it might be bad gas. Dirty Fuel Injector. 2019 Ford F-350 Super Duty Added utility in. I have a 2001 chevy silverado (110,000) that was making a bolt in spinning drum type of sound from the bellhousing area. 2020 GMC Sierra 1500 For Sale. 0 running rough, stalling. Retractable running boards. Real-World Knowledge from Professional Technicians. The engine is all back together and running perfectly with no leaks or problems anywhere except for an oil leak that has me baffled. vacuum when idling. '87 Chevrolet TBI 350 runs rough under load. Asked in American Cars , Chevy S-10 , Chevy. The truck starts, idles, and revs normally and when accellarating slowly everything works just fine, but once you get past half throttle it falls on its face and acts like it has a clogged fuel filter or bad fuel pump. Short time later check engine light came on and stayed on. If I connect the vacuum advance to direct manifold vacuum it idles very smooth but idle timing increases to 36*. changed temp sensor, ERG, cleaned and rebuilt the TBI, replaced all vac. Dec 17, 2013 at 6:11 PM #10. it is still a great vehicle. I got a 99 tahoe 5. If your engine starts operating in a manner that gives you the perception of “running rough”, it is likely due to a handful of common causes. Off idle and during acceleration it runs fine. When cold, started up perfectly. Also put AC Delco 100k mile plugs in just to be sure Autolites werent playing nice. matthew christian. 70 gears, but the existing hardware should not be causing the car to flatten out at 4,000-5,000 rpm. You're whole post scares the shiza outta me, lol. The carburetor regulates the flow of fuel and air to an engine. next on my list to check is first the ESC or if the timing chain slipped a tooth. I tried to find the vacuum advance components but am at a loss. Chevy Silverado Engine Ticking Noise I’ve heard many complaints from customers, in person and online, about a ticking-type noise coming from the engine on their Chevrolet Silverado. 9-liter six-cylinder Cummins diesel under the hood puts out 460 lb. This vehicle is plateable, and runs and drives just great. I had 1 gal. Soooo, anything that affects engine vacuum, can tell the MAP sensor the wrong information. Solving Intermittent Stalling Problems A faulty MAP sensor can sometimes mislead the PCM into thinking the engine is under a greater or lesser load than it actually is. The Common Problem: Rough Running Engine. The Certified Service technicians at your Chevrolet, Buick, GMC, and Cadillac dealers are expert finders and expert fixers. Chevy / GMC Duramax 04. I have a 1995 chevy 2500 350 tbi a/t. The truck has a 350 crate engine coupled with a Rochester Quadra-Jet 4bbl carb. He has certifications in automation and control technology. That American tradition is why you own a Silverado, and it's. Advanced users would also find this manual very handy. Under the guidance of a much smarter man, I built this engine myself. The Corvette is such a staple of the Chevy lineup that it made our list of Chevy cars three times (two good, one bad). Referred to as the low speed circuit by Weber, this circuit is responsible for 80% of the driving operation. If your timing is off or not advancing as rpms go up, then under no load you may not have any issues. A year worth of head scratching. The engine would not restart or idle. Well, I have been having the same problems that many of us on here are having with an iradic idle, hesitation under load, and sputtering up to like 3000 rpm. Average failure mileage is 63,000 miles. Tested; vacuum, fuel pressure, OBD 2 scan. Without the proper mix of fuel being supplied to the engine, the air/fuel ratio becomes lean which can cause a loss of power and slower acceleration. 2 problems here. Only use a real GM AC-Delco sensor. Over a long period of time the higher combustion temperature can cause valve damage. A few weeks ago, I made the mistake of selling off my old, and simple, '66 chevrolet pickup project and bought a newer('87) truck that would quickly turn into an even bigger project. Ignition Systems Cheat Sheet for the Chevy Small Block For our budget-oriented purposes we find that conceptually at least, GM’s HEI distributor is a near ideal choice in terms of practicality. prefer the email. Submitted by tiimmbo on Mon, 2013-12-16 19:53. Truck cold: ignition on truck not running 50psi and drops down to 22 in 5 minutes Truck cold. It only takes a minor problem like a fouled spark plug to cause. Class-leading displacement and robust design provide uncompromising durability and reliability, and the Mercury-exclusive Advanced MidSection (AMS) and under-cowl noise management. Symptoms----cold drive-ability, bucks @ part throttle, worse under load, backfires, belches black smoke(you should see my tailgate ) Timeline and service related incidents--- Little over a year ago, it quit a couple times---I mean locked down like the key was switched off. 1970 Ford 1 ton Dump Truck. As for jetting, on a new carburetor, the first thing is to see if the jetting is even in the ballpark. Backfires and pops, runs rough. 7 vortec that has been having a problem for about 6 months now. Engine skipped occasionally and would pop-pop-pop under heavy acceleration. They are part of a relatively small group of upgrade products that can bring both high-level aesthetic appeal and also real practical use to your car. Under load she misfires but runs great otherwise. Chevy 350 Stalls When Put In GEAR This car has a 75 engine and was built to race has a total ford 9inch rearend and a ratchet shifter, the engine has a nice cam{whatever that means} sounds loppy any ways in neutral it will idle around 6-8 hundred rpm, when in gear it stalls. when car is in park runs bitchen and rev it up no problems or stumbleing seems like only happens under a load. The problum is as follows. Engine starts OK, increases RPM then gets too slow with lots of black smoke. by Ed Ruelas on January 08, 2016. So if you add a spacer, do not forget to check your hood clearance BEFORE you slam the hood! Another thing to think about when you start getting into the big pump cams and nozzles is to use the hollow nozzle hold down screw. tested fuel pressure - steady at 55 at idle, goes up a little. First off when i got the car running i had the timing light ready so i could check / set the timing to around 10-16 deg BTDC. and ECM engine runs now but doesnt stay running, idles rough. Won't plane out, and wont go over 3,000 rpm. Having a problem with the engine. ( I figure the tank was under vacuum but I am not sure). The new Silverado HD. The PCM will then use default settings for the ICP and the rough running should go away. Objective of this Article This article will walk you through the process of installing a MegaSquirt EFI system on a classic carb’d vehicle attempting to go the least expensive…. Additionally, some diesel truck fueling stations or retailers may. Therefore, due to differences in the expansion rate of the metals when heated, the spark plugs tend to pop out because aluminum expands more than steel. The truck starts and runs great untill it warms up. 2-liter supercharged V8 that puts out an. I own a Chevy S10 and have my friends here that is the 2001 version and it has the plastic intake air set up on it, it is a 2. That American tradition is why you own a Silverado, and it's. It has a rough idle when cold but will run after it gets warm. I just bought a 79 Chevy C20 with a 350. The engine runs fine when cold but as it warms up it starts to "surge" at idle and when you come to a stop it acts like it wants to stall then it grabs. On V type engines having two manifolds, make separate tests on each manifold. It's about 2-3 inches BTDC. Hey guys i need some help i am absolutely stumped. An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. I've checked the timing and it's set at +2 degrees. That cam is nearly identical to Eddy's Performer cam, so it's a match to the heads. I have a 97 Suburban 5. If the truck runs rough when it’s cold but clears up when the engine is warm, you have a stiction issue in your injectors. Rough Shifting or Lack of Response. 2 Hesitation & Stumble. He has certifications in automation and control technology. I put the engine on TDC 1 piston and installed the distributor and all spark plug wires. Technical Reference. Team Chevelle Supporting Members. Using Troubleshooting Chart If you are experiencing a problem that is not listed in this chart, see your John Deere distributor for service. I replaced spark plugs as the problem occured while driving. It run good but when you take of it seems like it lose power. drove it home about 15 miles spitting and sputtering up every hill. 1983 chevy C-20 305 ci. 7 vortec that has been having a problem for about 6 months now. Under a load on a hill it feels like I am loosing one or two cylinders. 2011 Ford F-350. 05-19-10 02:12 PM - Post# 1917465 In response to mid tenn mike I will be VERY surprised if this ends up solving your problems. The car idles great and has 20 to 25 lbs. Run the engine at a high idle for about 10 seconds. 350 engine. Some examples are weather, temperature, humidity, elevation and fuel type. Silverado HD is ready for adventure. 1995 Chevy C10 1500 5. Used Cars for Sale. The best way to acknowledge the problem is to come to a dead stop and stomp on the gas. Ok here is the deal. Phone number is subject to long. I had 1 gal. This is a homemade rat rod built form parts of a chevy, school bus, and other various parts. Electric choke works great, after the choke comes off and the car idles at 800 rpm glass smooth. That's a long story from when my project began. Sometimes a car will refuse to change gears or just won’t shift smoothly. Also put AC Delco 100k mile plugs in just to be sure Autolites werent playing nice. Replaced: 1) Replaced the coolant temperature sensor 2) Replaced MAP sensor 3) Checked the throttle sensor response is as required 4) Checked the O2 sensor via propane torch test, checked fine 5) Replaced the Fuel Filter 6) Checked the. Please ONLY CALL 1-306-442-9999 (landline) if you are interested or want to know more. On V type engines having two manifolds, make separate tests on each manifold. Rough Idle on my Chevy 350 66 chevelle that little the carb got gummed up and he needed to run a few gallons of racing fuel to clean things out and wake up the. I have checked compression and pulled valve covers and all seems fine. Cracked fly wheel usually gets louder as it gets hotter, or under heavier load. 61 Great Deals out of 4,381 listings starting at $19,590. I have tried 1/2 can seafoam and let it set for about 20 minutes. 7L Chevrolet truck.
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