I have a 1998 chevy 350 that is backfiring through carbourator. Tried everything, three different mechs cannot solve. Please help, Regards, Andre
just a thought, but , if engines are basically stock in nature, putting high performance electrics into them like MSD distributor was a wrong decision . I would replace them with a more stock distributor setup, my reasons are based on my own experience with my 1988 gmc 350. tryed to get a greater spark, more bang for my buck, it ran , but when my mechanic tryed to perform an emissions test , I had your same problem, even fire exploding out of carburator, he literally blew a gasket @ me, almost burned his arm off. he races cars for a hobby, first thing he said was to put back the stock distributor & coil, I did , success ! in coclusion, you have too much fire (spark) and your timming might need adjusted a bit ! HOPE THIS SHEDS SOME LIGHT !
on Feb 24, 2013