please help I have an 1989 Camaro rs 305 tbi. it will start but barely run and will die. I replace the EGR value, the IAC value and the PCV and hose going to the throttle body. my map sensor tested to be good. after doing all that it runs a little better but not much, instead of just dying it tries to keep it self running it has very low idle and will still stall most of the time.

 

test fuel pressure

 

Good advice.

I'd also inspect the distributor cap and rotor, plug wires, and spark plugs. It would be worthwhile to do a cranking compression test, a leakdown test, and a cylinder-balance test; all to determine basic engine condition.

After that...it's scan-tool time.