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kmauldin · 03-03-2005, 07:55 AM

Does anyone know how to check that the PCM (ECU/brain-box) is functioning properly or how to check if the engine has "jumped" time (meaning one or both of the timing chains have slipped)?

Mine is running extreemly bad, like the timing is off, and the OBD code reader shows two codes saying there is an ignition curcuit "malfunction." My initial tests suggest the PCM is not sending the spark to the coil-packs but I wanted another way to confirm this. Any suggestions?

thanks

03-03-2005, 07:55 AM	#1
kmauldin Registered Member Join Date: Nov 2001 Location: Atlanta, Ga. Posts: 22	97GT-Timing problems Does anyone know how to check that the PCM (ECU/brain-box) is functioning properly or how to check if the engine has "jumped" time (meaning one or both of the timing chains have slipped)? Mine is running extreemly bad, like the timing is off, and the OBD code reader shows two codes saying there is an ignition curcuit "malfunction." My initial tests suggest the PCM is not sending the spark to the coil-packs but I wanted another way to confirm this. Any suggestions? thanks __________________ KMM '97 GT coupe; K&N, 3:73's, steeda tri-ax, Mac catted H, Mac flow-path cat-back, aluminum driveshaft, white face guages