454 Chevy engine backfires
Replaced a 454 engine last fall, drove it about 350 miles and put it in storage for 6-7 mos. when i got it out,it started backfiring under a hard accel. Any suggestions//
Forum Discussion
Some years ago I bought a beautiful 88 allegro with 454 loaded with smog stuff. the first thing I did was replace the timing chain and gears with a full roller with straight up keyways add dual exhaust and get rid of all smog stuff.That thing ran like a scalded dog. Because we know smog motors have keyways cut 4-8 degrees retarded.....so, did you use your old retarded chain and gears? If not ,did you degree your cam to see if it was retarded? just a thought.....like a doctor you have to eliminate everything.
