Oil Pressure Gauge Pegged

***Ed Blown Vert*** · 09-18-2009, 07:53 PM

Replaced engine. Fires right up.
Oil gauge is pegged.

Replaced the sensor and checked the wiring the best I could.

What else could it be?

**Mr. Luos** · 09-18-2009, 10:04 PM

First thought is bad sensor.

What is the reason why the original sensor was replaced??? Just in case?

**Smittro** · 09-18-2009, 10:22 PM

Try checking the part # they may have given you the wrong sensor. A full 12v would peg the guage and hate to say it but the guage could now be toast.. Sounds like over voltage and most guages do'nt like to be pegged for long they will fry or become damaged to the point where it will never be accurate again..

***Ed Blown Vert*** · 09-19-2009, 04:44 AM

Looks like the sensor wire is either pinched or broken somewhere in the harness that runs into the cab.

**Hi-Po** · 09-19-2009, 08:00 AM

Wiring. How are you running the wires in the cab? Is this aftermarket? If the guages is moving at all (pegged) that would make one think its at least getting power. I would check the ground side of things. Although, I dont know if this is aftermarket wiring or not.

***Ed Blown Vert*** · 09-19-2009, 08:04 AM

Its all stock wiring. Grounds look good.

I was able to trace the sensor wire to inside the cab. If I ground it, the gauge will read zero. Which tells me the wiring is fucked.

**Hi-Po** · 09-20-2009, 03:40 PM

Originally Posted by Ed Blown Vert

Its all stock wiring. Grounds look good.

I was able to trace the sensor wire to inside the cab. If I ground it, the gauge will read zero. Which tells me the wiring is fucked.

Well, tracing that down will be a major PITA. You could try and follow that wiring and look for obvious problems. Running new wiring might be easiest. Whenever I had a electrical problem that was obvious wiring... I would make new wiring and run it.

***Ed Blown Vert*** · 09-20-2009, 04:21 PM

I was running a new wire from the cab to the sensor plug, then the plug cam off. That is where the break was.

Resoldered and I have oil pressure showing on my gauge.

**pajeff02** · 09-20-2009, 04:24 PM

Originally Posted by Ed Blown Vert

I was running a new wire from the cab to the sensor plug, then the plug cam off. That is where the break was.

Resoldered and I have oil pressure showing on my gauge.

Where did you run your wires into the cabin at? I understand there is a place under the PCM, but am wondering if there is anything on the driver side that is reasonably accessible.

**Hi-Po** · 09-20-2009, 04:36 PM

Originally Posted by Ed Blown Vert

I was running a new wire from the cab to the sensor plug, then the plug cam off. That is where the break was.

Resoldered and I have oil pressure showing on my gauge.

Glad you found it easily.

Originally Posted by pajeff02

Where did you run your wires into the cabin at? I understand there is a place under the PCM, but am wondering if there is anything on the driver side that is reasonably accessible.

No, there is no hole on drivers side. Have to make your own.