psalm10720
Mar 06, 2018Explorer
93 Brave with Chevy 454 acceleration issuea
Have a 93 Brave 27RC on a Chevy P30 chasis. 112000 miles. When cold idles well and accelerates well from standing still. Then after warmup when accelerating from a start it falters often. Some refer to it as “falling on its face” or “backfiring” without the loud noise. One of the possible explanations refers to the “accelerator pump” on the carburetor. Another which sounds more plausible is the ECM has a problem because the programming during warmup is different than after the engine is warmed up... Anybody with experience?