HPOP question

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Dec 23, 2009 | 11:38 AM

nunya001

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HPOP question

What is the small electrical plug on the top of the HPOP? You have to remove the plastic over to get to it. What does it do?

Dec 23, 2009 | 11:41 AM

riverrat41

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From: Glen Rose,Texas

If I am reading right that is your oil pressure sender

Dec 23, 2009 | 11:46 AM

nunya001

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what is it's function? Are they known to fail at all?

Dec 23, 2009 | 12:10 PM

aklim

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From: Hartford, WI

Oil pressure for the LPOP. If I am right don't worry about it. By the time it comes on (3-5 psi), your engine will have shut off or is toast.

Dec 23, 2009 | 12:20 PM

nunya001

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Ok - not sure that makes sense to me. Can you explain? I'm tracking a warm engine stalling condition and am working through my process of elimination as methodically as I can at this point.

Here's my original thread. https://www.ford-trucks.com/forums/9...challenge.html

Dec 23, 2009 | 12:28 PM

aklim

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From: Hartford, WI

Quote:

Originally Posted by nunya001

Ok - not sure that makes sense to me. Can you explain?

If it is the sensor I am thinking of, all it does is move the oil pressure needle to the middle when it sees 3-5 psi or more of oil pressure. So, what good is it? It is an idiot light to tell you that you have 3-5 psi of oil pressure. Not enough to keep the truck running.

Dec 23, 2009 | 01:51 PM

PaysonPSD

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From: Payson, AZ

Just an FYI. On the back of the HPOP reservoir is the EOT (engine oil temp) sensor. Someone did post once that by changing that sensor he had cured either a warm engine stall problem or a warm engine lack of power problem (as in limp mode). Can't remember which. Haven't been able to find the post. Don't know if the PCM uses any type of default if that sensor is unplugged or if reading is too hot will it go into limp mode or stall. Worth considering when all else leads you nowhere.