Question about 1991 GMC S-15 Jimmy
I have replaced or tested the following: fuel pump,fuel filter,ignition module,pick-up coil,plugs,wires,cap,rotor,iac,tps,coolant temp sensor,and it has gotten better. It will starts after cranking a bit and will run if I keep slight throttle pressure and seems to have all of its power, but as soon as the throttle is released for an idle it will stall and sometimes is very hard to start again. I have been a mechanic for over 15 years and this has me stumped. Is there something I am overlooking or missing or could it possibly be the ECM. Ihave retrieved codes from the ECM (tps and O2) cleared and repaired so i figure that the ECM is operating properly.
I HAVE THE SAME JIMMY, HAD THE SAME PROBLEM, I REPLACED THE IGNITION SWITCH , THAT FIXED IT.
Posted on Dec 28, 2008
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