Low oil pressure reading - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 01-26-2020, 10:12 PM Thread Starter
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Question Low oil pressure reading

I have an 06 6.0 and sometimes at idle (usually at a stop light) the oil pressure gauge goes all the way down and the alert goes off. When I rev it up or take off the pressure goes back up to normal. I'm not a complete dummy but this is most likely a oil pump problem right?

dave
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post #2 of 5 Old 01-26-2020, 11:05 PM
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The gauge is not really a pressure gauge -- merely a feel good indicator
the pressure switch trips at 5-7 psi
so if you are seeing the 'gauge' drop at idle, you have less than 5 psi oil pressure

There is a pressure port on the front of the oil cooler housing, that you could connect a real gauge
metric threads, would need an adaptor

One thing you could check is the pressure regulator -- looking at the crank pulley -- about 8 o'clock
take the plunger out and see if it is stuck/scored or any debris in the bore

How many miles on the engine?
seem to idle smoothly?
any thumping in the intake or exhaust?

In my defense, I was unsupervised
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post #3 of 5 Old 01-27-2020, 03:41 PM
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did you change oil recently? what oil filter? some after market filters and cap could interfere with the valving in the filter housing. Be sure to use OEM filter (motorcraft) and cap.
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post #4 of 5 Old 01-27-2020, 11:24 PM Thread Starter
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Engine has around 135,000 miles. Yes it idles smoothly and no odd noises. I will check the pressure regulator and see what's going on in there. No recent oil changes....
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post #5 of 5 Old 01-28-2020, 04:02 AM
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As knotreel asked, are you using Motorcraft oil filters and do you have the OEM oil filter cap? The OEM cap sits about 1 inch above the housing. The aftermarket caps are at least twice that tall. Several good youtube videos on this and the issues they can cause.
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