Hey Guys,
I'm stuck and could use some help.
Just finished putting together top end on 88 sbc 350 w 906 Vortec heads, comp cam 12-231, performer intake, original(rebuilt) QJ carb. Original bottom end. Engine fired right up, set idle to 2000 for 20 minutes to break in cam, slowed idle to 800, set timing(12). Engine was running great, then it wasnt... Engine is now running very RICH, I mean that it fouls new plugs in 5 minutes or so and dies. Fuel vapor coming from tailpipes. Very rough idle. Idle mixture screws out 1 turn. I don't know what the heck happened. Any idea on where to start, what to check, etc... Thanks!