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1997 F350 7.3 losing voltage & pressure at same time on the high pressure oil pump

After truck warms up, the scanner shows actuation pressure dropping and current to the actuation solenoid dropping at the same time. It only does this while driving; runs fine at an idle.

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Check drive belt condition and tension as it appears that when the load is on the alternator at higher RPM's it is tending to slip and not charge properly.

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Posted on Jan 02, 2017

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SOURCE: 1992 gmc chevy 350 wont idle when warm

This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Posted on Apr 17, 2009

  • 247 Answers

SOURCE: 02 cherokee losing oil pressure when accelerating, fine at idle.

Was the sending unit an aftermarket part?We like to install the original part back into most vehicle, but because of people price shopping, this can cause some issues. If the switch is working properly, the gauge should rise as the engine RPM's increase as you stated. With the key on and the engine off, disconnect the sending unit wire and ground it. The gauge should go to the highest reading, and that checks the wire, and the gauge. I suspect that the sending unit is failed or not the proper one for your vehicle.

Posted on Jan 07, 2010

  • 4336 Answers

SOURCE: Dodge 2.7 I'm losing oil

The first stop is to measure the pressure with an external gauge. if the readings are the same, surgery is needed, I would look at the oil pressure relief valve for foreign particles.

It takes resistance to make pressure, and your decsription does not sound good. If the pressure is actually dropping, and you find no issues with the oil pump and pick up, you need to measure bearing clearances... Essentially, everywhere oil is pumped needs to be inspected...

Posted on Oct 31, 2010

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Have a 96 chevy cavalier. replaced IAC,fuel pump assembly, fuel filter, tested and adjusted TPS but still haveing problem with car shutting off after about 30 mins of driving. Also once "warms" up during...


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dont run it anymore!!!
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