Questions & Answers for: ecm 5 3 2002 gmc

...5 minutes when the fuel system went in to closed loop mode (about 200 RPM swings at idle that slowly went away). Days below 10 degrees were much worse. I cleaned the MAF sensor, checked fuel pressue, ...

...5 seconds and start. this will reset the ECM to default. It may stall again but let it, just start it again and let idle for 3min and go foe a test drive. This should reset the way the engine and ...

5 volts, the ECM shuts down the ignition system. Start with addressing the battery first, most battery last only 4 to 5 years the most and yours may just be at the end of it's life time. Good luck and

ECM MODULE UP-DATED AND WE REPLACED THE THROTTLE BODY. NOW WE ARE BEING TOLD THE NUMBER 5 COIL IS MISFIRING. HELP! What code is the CEL pulling? I6 engine? Depending on how many miles are on it, coil