Engine Performance problem
1990 GMC S15 6 cyl Two Wheel Drive Automatic 145000 miles
I have changed the spark plugs, wires, distributor cap, rotor, EGR valve, IAC valve, rebuilt the TBI with a rebuild kit. The truck has a rough idle when the AC is on. The RPM's will increase and decrease until the engine dies. The idle is smooth when the AC is off. When you put in drive with the AC on, the engine dies. It will also die at stop signs and lights while driving. Do you have any idea what the problem might be?
have the same problem?
Friday, June 26th, 2009 AT 8:03 PM