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F-150 losing oil pressure

Tiny
HAILEY45769
  • MEMBER
  • 2000 FORD FIVE HUNDRED
  • V8
  • 4WD
  • AUTOMATIC
  • 114,000 MILES
Hi I have a 2000 ford f150 supercab 4x4 with a 4.6litre triton (romeo) motor. When it warms up I completely loses oil pressure. Now I can shut it off and then start it right back up and I will have oil pressure again for about 30 secs to a min. I changed the oil filter from a motorcraft to a stp and put 10w-40 motor oil in it and it still does the same thing.
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Monday, June 6th, 2011 AT 6:15 PM

4 Replies

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
See if anything in this answer might help you.

https://www.2carpros.com/questions/1995-ford-explorer-after-repairs-oil-pressure-drops-to-0-at-idle

The Medic
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Monday, June 6th, 2011 AT 6:39 PM
Tiny
HAILEY45769
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  • 3 POSTS
I also ran a gauge test and the oil pressure does go clear out
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Monday, June 6th, 2011 AT 7:14 PM
Tiny
HAILEY45769
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  • 3 POSTS
And it does not change if I rev the motor or not.
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Monday, June 6th, 2011 AT 8:44 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
So you are saying with a mechanical gauge installed, pressure drops to "0" (ZERO?). Does not come back up?

If this is the case, are you experiencing Engine Rattle/ Clatter/ or Knocking?

The Medic
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Monday, June 6th, 2011 AT 10:19 PM

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