Who has seen a crank no start on a 1999 Vp-44 and it was a bad PCM ?
Ran through the test on Bluechip diesel, cut shut down solenoid power. Hooked power and ground straight to pump and truck start and ran.
Varying voltage on pin 4 and pin 8 of the connector. The only thing I couldn't test was the can-bus going to pump.
First swapped ECM still crank no start.
Swapped PCM then it fired right up and idled. My question what inputs go through the PCM and communicate to the ECM.
My only assumption is something on the CAN circuit was telling the truck no to run.
Just interested in some personal experiences as why. No faulty sensors or circuits.
Ran through the test on Bluechip diesel, cut shut down solenoid power. Hooked power and ground straight to pump and truck start and ran.
Varying voltage on pin 4 and pin 8 of the connector. The only thing I couldn't test was the can-bus going to pump.
First swapped ECM still crank no start.
Swapped PCM then it fired right up and idled. My question what inputs go through the PCM and communicate to the ECM.
My only assumption is something on the CAN circuit was telling the truck no to run.
Just interested in some personal experiences as why. No faulty sensors or circuits.
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