Chevy 454 Running Rough, The big problem I have a weird issue with the 454 in my 2000 GMC K3500. I have also done the FPR. I installed an adapter and fuel pressure gauge at the tbi and converted the regulator to an My 1999 GMC ccsb is running pretty rough. hot weather, cold weather, up hills, in traffic, or heavy load. Does that on each warm-hot start. It now runs comfortably at 180-200 degrees. org they can really help you build your credit! If your chevy gm tbi is running rich this will help you trou If anyone could give some advice, it would be really appreciated. I have a rough idle problem on my 454 that is driving me nuts. Need some advice on diagnosing a motor problem on my tow pig. 4l 454 big block. Before purchase vehicle had a valve job in 2014 by PO's mechanic at 133,000. This article will delve into the common issues associated with the Chevy 454 engine, providing insights into their causes, potential solutions, and the implications for safety and performance. I've been racking my brain for a long time. Here’s what I’ve done trying to fix it: The engine began running rough a while back, not too bad, and its slowly gotten worse to the point where its time to get it figured out. 4. I bought it knowing it has some issues. . It idles rough and stumbles until it gets about 1500-2000 rpm. Bought in 2015 with 136,000 miles. Had it running good and after driving about 50 miles a lifter fail (collapsed). The owner reported significa Having a hell of a time figuring this out. I looked at the live data on a scanner Never did it idle in gear. I just checked for a bad head gasket with the combustion Chevrolet 454 big block running very rough only at idle and low rpm's. When I watch it idle at the tail pipes it will suck a rag in and out on the right bank, but not . Per advice from the cam Need to build your credit goto www. No engine codes are stored. It's now to the point My TBI 454 has been running rough. The previous owner said the injectors were done but im not entirely Hey guys. Started it up the Explore common Chevy 454 engine problems, service bulletins, and statistics to stay informed and maintain your vehicle effectively. My truck has had this rough idle since I bought it. Truck has been a perfect truck for a long time. It did Hello, recently purchased an 88 R30 with 454 tbi. creditchicken. Please help me out. Ive tried everything I could, verified my transfer slots weren’t overexposed, Hello first time posting here. My 454 TBI starts and idles low, but after about 2 minutes (once it warms up), it starts backfiring through the air filter and won’t take throttle. . and sorry for the long post. I drove it home for 10 hours, no issues, running great. Recently I've been having a progressively worsing issue where it would stumble slightly under load. Hope it helps someone out there. After I did the swap it ran pretty good, kinda rough idle, stalled sometimes when put into gear. Explore common Chevy 454 engine problems, service bulletins, and statistics to stay informed and maintain your vehicle effectively. I switched the AC Jeff Smith offers some troubleshooting tips for fixing a modified Chevy big block V8 with an off-idle hesitation. But no matter what I do After replacing the aforementioned parts, the truck now starts right up every time regardless of how long it has been sitting, but it runs ROUGH. Have a 99 suburban k2500 7. 4 Vortec. Here’s what I’ve done trying to fix it: - Replaced So I got this 454 that's I had rebuilt and has around 2k miles on it. Hi all, I recently picked up a 99 2500 Suburban with a 7. It’s not bad, but it’s rough enough to for me to notice when sitting at a light, and with such a mild setup, it figured it should idle Seemed to have been good up until a couple weeks ago it started running rough except all the time now. However, once it started to not idle at all, I was able to get it to stay running, with a board on the accelerator (so I could watch the injector spray pattern), between Today was an unexpected fix to a 1996 454 Suburban that was running like crap. History: It used to only do it when it got real warm like 200*ish then it would miss and sputter really bad with small throttle inputs but seemed ok if you Man this engine has been a pain to get going right, its been quite the learning process. It’s not bad, but it’s rough Join us as we tackle a perplexing issue with a 1997 GMC 3500 featuring a powerful big block 454 engine running excessively rich. So, I was trying to adjust the air fuel mixture on my Chevy 454 with an edelbrock carb. But the frame and body are great so a few problems can be fixed. 1992 K2500 suburban with the 7. As soon as i start it in the morning it seems to have an intermittent miss. Ran rough Restarted back 10 seconds later and starts with a very low, barely running idle that over 20 seconds slowly increases back to 800-900. I have a 454 with a new Street Avenger 770 vacuum secondary and its running so rich that it burns my eyes. As I drove it to my storage spot, It started not taking part throttle and throwing a my 454 in a heavy truck (stock build) used to run 210-220 under a light load. I have already done plugs, wire, cap, and rotor.
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