I'll soon be getting into the prom burning scene, but right now, i just got my diagnostic software working and saw something very strange. The car always seemed to run rich after running for about 1.5 minutes. I'm guessing it'r running rich because the exhaust starts spewing out liquid and stinking hydrocarbons a minute or 2 after a cold start. While on the scanner, I saw that it going into closed loop is the change that causes this. I am suspect of leaky injectors because the engine always floods itself when I want to do a hot start 5 minutes after shutdown.

The engine isn't stock. It's a 1988 vette l98 engine with a 1987 firebird ECU/prom/harness. Thus with the aluminum l98 heads in a car that thinks it's all f-body, there is no EGR operation. The A.I.R. is currently only hooked up to the manifolds.

Does any of this make sense? If I'm wrong, please somebody put me in my place! Thanks.

 

Are those the 58cc heads?
If so they take a totally different calibration to get to work right. Well at least for the timing. At cruise they like about as much at you can give them, and then at WOT run really well with 24-28d of timing, yes there are no typos in that. The large chamber iron heads need tiiming in the mi 30s but not the D port early AL vette heads.

If it was leaking injectors it would be hard to start all the time. Hot restart is usually in the coolant temp correction table error.