92Raiderburban
OBS Enthusiast
- Joined
- Sep 28, 2014
- Messages
- 60
- Reaction score
- 35
I want to ask after searchin and getting various answers, is this a LEAN or RICH condition when this occurs?
Backstory:
Carb converted L29. HEI has new internal guts. New platinum iridium plugs. For the last 3 weeks I had very bad backfiring out the top of the 4 barrel and truck didnt run right, dead stop acceleration being very sluggish. The choke being completely open would result in worse backfiring than when it would be barely open upon cold starts. 3 of the plugs when pulled were oil fouled, looked nearly the same as valve carbon build up on any high mileage engine, caked with black sludge and grime. One smelled like gasoline a bit. The rest seemed ok but showed their aging. Changed them out about a week ago, and all was good until last night. Started back firing again. Performance is still way better than it was a month ago but I'm noticing a steady decline as I have to open throttle more to get it move. This engine is burning oil, (bluish smoke out the exhaust) and need to top off with 2 quarts every 8 days. Could this have something to do with it? And if so what are my next steps to eradicate this problem?
Backstory:
Carb converted L29. HEI has new internal guts. New platinum iridium plugs. For the last 3 weeks I had very bad backfiring out the top of the 4 barrel and truck didnt run right, dead stop acceleration being very sluggish. The choke being completely open would result in worse backfiring than when it would be barely open upon cold starts. 3 of the plugs when pulled were oil fouled, looked nearly the same as valve carbon build up on any high mileage engine, caked with black sludge and grime. One smelled like gasoline a bit. The rest seemed ok but showed their aging. Changed them out about a week ago, and all was good until last night. Started back firing again. Performance is still way better than it was a month ago but I'm noticing a steady decline as I have to open throttle more to get it move. This engine is burning oil, (bluish smoke out the exhaust) and need to top off with 2 quarts every 8 days. Could this have something to do with it? And if so what are my next steps to eradicate this problem?