Hello everyone
#16
Join Date: Jan 2012
Location: Southern West Virginia
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I would try what Mike said ^^^^^^^^. The wiring harness for the IPR runs under the fuel bowl to the passenger side of the bowl to a connector. That connector is where the fuel bowl and IPR harness plugs into the main engine harness. If you know for a fact you have no ground to the IPR, then the next step I would take trouble shooting this would be start tracing the wires back and see where you are loosing the ground to the IPR and why.
#17
Thanks that was some of the first testing i had done and installed a mechanical gauge in each side and deadheaded it and only got 198-200 then removed cleaned and installed ipr and still low then tested circuit and found no ground pulse ,added ground and spikes gauge instantly past 3000 psi should put on my 10000 psi gauge but didn't think it was needed. can't get my oscilloscope working even with new batterys so going to use my scanner to test wave form shortly.I will let you know.
It does sound more like an electrical problem at this point. Have you tested continuity for the ground wire from the IPR to the PCM?
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Jbrown8988
1999 - 2003 7.3L Power Stroke Diesel
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04-16-2013 11:00 AM