Tuesday, June 3rd, 2008 AT 1:55 AM
Newly rebuillt olds 455 big block with edelbrock performance package, heads, intake, 750 carb. The car ran great for two days. Now car backfires thru carb and exaust. Mostly exaust. It only backfires after engine is warmed up and I step hard on the gas. Also when I get my first backfire after engine is warmed up, car will stall when I come to a stop and is really hard to start again, it will spit and pop thru carb when trying to start it. When car sits over night it starts up great and runs great until engine is warmed up. Please help.