Engine Performance problem
2001 Dodge Caravan 6 cyl Front Wheel Drive Automatic
this vehicle originally came in as a no start the pcm was burnt, it was replaced and the cause not found, this pcm lasted 2 weeks. The next pcm installed lasted 3 days. Again no reason found for the burnt pcm. All wiring to the pcm has been checked, NO opens, or shorts to power or ground, all sensors, injectors, coils, and solonids have been checked, NO problems. All engine compartment wiring has been exposed and inspected and tested, NO problems. Engine cranks but no injector pulse and no coil trigger. Pcm has powers and grounds confirmed. 5 and 8 volt outputs - good, cam and crank signals - good, a known good pcm from a running vehicle was installed and still no injector pulse and no coil trigger. On initial crank there is one pulse of the injectors and one spark from the coil, scan tool can command coils and injectors, all scan tool data looks ok. Cam and crank are syncronised, tranny was removed to confirm the center did not break out of the flex plate. It has also taken out the cam sensor, crank sensor and map sensor, all have been replaced and are presently working, there signals have been confirmed with a lab scope.
have the same problem?
Thursday, November 19th, 2009 AT 6:53 PM