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and it looks like my gpr is bad. after re-checking my install 5 times, i put a test light on the gpr with te ignition on. the terminal/lug the power wire is supposed to hook to doesnt seem to be producing any power.
Yea I had the same problem when I first got my truck the po told me the glow plugs were no good. Come to find out it was just the gpr. I did some research and ppl said the Stancor gpr is much better. It was half the price of the napa one and way bigger and better. I bought mine from mouserelectronics.com. there is a write up on it, I will see if i can find it.
The PO of mine didn't mention anything about Glow plugs or the GPR. It was in a shop when I went to see it and started great. Not so much the next day when it was parked outside in the cold prairie winter.