IAC maybe?

[Camaro_nut2001]

Originally Posted by ChevyTech

Immediately after you shut off the engine look at the TBI unit and see if fuel is leaking.

A damaged injector o-ring can allow fuel to dip in the throttle bore. A gasket leak can on the upper TBI also cause this problem.

Another problem is that the TBI unit is thin by the injector o-rings, and if lube is not used on the o-rings, sometimes the TBI aluminum cracks in the area of the o-ring.

Another possibility is the coolant temp sensor connector is in poor condition and got bumped when you were working under the hood. Any resistance or connection problem will make it read colder then it really is. Colder means more gas gets injected.

Thank you ChevyTech. I did pull the breather & watched it after turnin the key off & sure enough, the top o-ring on the left side injector was leaking. I pulled the top back off, injector out, found an o-ring in my parts bin that was almost the correct match, enough so that it worked lol, lubed it & the bottom o-ring up with a little wheel bearing grease & problem solved. Thanks for your very quick reply to help me.