THe Coil on the IPR can be tested , but not the valve , I think no the ICP as well . A scan will tell most of what you need ...
This is from member Pocket:
Quote:
you have to view the ICP. When my truck wouldn't start, I watched ICP pressure, voltage, and duty cycle along with the engine RPM's. I cranked for about 10 seconds or so, and watched as the ICP voltage and duty cycle increased, but the pressure did not. It stayed between 100-130 psi no matter what. That told me that as voltage and duty cycle increased, the IPR was not responding and maintaining pressure. If it was a voltage issue, then it would have been the ICP sensor itself.
If I remember correctly, to start you need at least 400 psi of high oil pressure, and 0.8 volts on the ICP.
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