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Apr 28, 2016 | 08:20 PM

#16

ReBilld

Hotshot

Joined: Jan 2012

Posts: 11,132

Likes: 3

From: Southern West Virginia

Quote:

Originally Posted by fordpride

My next step would be to pull the fuel bowl and inspect all the wiring. Years of fuel spilling/leaking can eat up the wiring as they aren't oil rated.

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.

Apr 29, 2016 | 08:28 AM

#17

cowmilker08

Logistics Pro

Joined: Oct 2008

Posts: 4,818

Likes: 1

From: Avilla, IN

Quote:

Originally Posted by autotec

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.

So when you dead headed it, you got just 200 psi both times? What did you get with both ports dead headed?

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?