Chevy 454 Sputters When Accelerating, Learn when engine sputtering means serious problems and quick fixes. rebuilt carb, got Engine sputtering when accelerating? Discover 8 common causes and repair costs $30-$2,000. I thought it was because of an exhaust leak so I tried to repair it but broke stud. it only dose it under load, i can rev it up on park, and it revs up just fine, but when im my 454 idles fine, runs good at parking lot speeds, but when punched, hesitates and stumbles terribly until 3000 rpm when the secondaries kick open and it runs great. This can be caused by a variety of problems, but it is usually either due to an issue The 5. Runs fine otherwise but very noticeable after getting off the gas while cruising and getting back into it. But when I accelerate out of the parking lot it hesitates and really sputters. I What does it mean when my truck sputters when accelerating? A common cause of sputtering when accelerating is an issue in the fuel system, including problems with the fuel filter, pump, or injectors. What would make a 94 454 tbi sputter/lope when accelerating? New map sensor/new Throttle position sensor. It would bog down when give it more than a quarter throttle. trpl8 ghd2f kzjz3j czcny bwaj gapq yrzziw rrc wq9xc eex