I have an 87 iroc with a 305 tpi auto trans. I've been having some trouble with the engine lately. I don't know if the gas has anything to do with it or not, but here's the trouble.
The car starts fine and seems to bounce idle a little. If from a dead stop I feather the throttle it will go, but if I get on it a little it sputters and won't go until I back off the throttle again. Then, it will catch and go until the rpms drop around 3rd gear, where it will back off power again and sputter.
I pulled the iac and tried to clean it but the pintle came out, so I screwed it back in.
Any ideas? It does have some high miles but had been running really good.