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Power Strokes
7.3 Tech
Strange issue - starting and GPR related
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[QUOTE="maxtrax, post: 743773, member: 1021"] So I am trying to help a friend fix his truck (early 99 7.3 PSD). It wouldn't start when the temps are 40 or less without the block heater. I checked the GPR and it turned up bad... it would click as if working properly but pass no current through it (constant 12V across the big lugs). Glow plugs themselves checked ok. I picked up a new GPR from the International store and put it in. Seemed to work ok and the truck started right up. Couple days later the truck was moved around and hooked up to a trailer. Total run time was a couple minutes with the new GPR. He told me it quit, and would only run for about 5 seconds when trying to restart it. I took my truck and we jump started it and no matter what it would only run for 5 seconds. I disconnected one of the small wires from the GPR and it will start/run just fine. It was clicking like normal when i installed the GPR but now does not click when you turn the key. It will click and pass current with the small wires disconnected and manually jumping power to the small pins. Hooked my auto-enginuity up to it and pulled these powertrain codes: P0380 Glow plug/heater circuit A P1316 Injector Driver Module Codes Detected P0344 Camshaft Position Sensor A circuit intermittent (bank 1 or single sensor) P0470 Exhaust Backpressure Sensor KOEO (key on engine off) with the GPR hooked up resulted in: P0380 Glow plug/heater circuit A P0470 Exhaust Backpressure Sensor P1219 CID Low KOER (key on engine running) with GPR hooked up resulted in: P1219 CID Low Buzz test would not complete with GPR hooked up. Cylinder contribution without GPR checked out with just the normal cylinder 8 failure. Small wires are red and orange (or light red). Both wires were returned to their respective places that they were on the original GPR. [/QUOTE]
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Strange issue - starting and GPR related
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