1993 Ford F-150 Low oil pressure

Tiny
MLROESER
  • MEMBER
  • 1993 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 163,000 MILES
When I start the truck, the oil pressure does not come back to normal range. There is the proper amount of oil in the truck. I am thinking it could be a bad oil pump or possibly an oil sender switch. Would a dirty oil filter cause high or low oil pressure. I guess that would depend on where the pressure sensing switch comes of the oil line. Any help would be greatly appreciated.
Saturday, January 30th, 2010 AT 12:37 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
How low is the pressure? Have you ever heard any ticking or knocking from the engine? Also, if there is any concern of the oil filter, I would recommend changing the oil and filter. If you never hear any ticking or knocking, replace the oil sending unit. IF that doesn't take care of it, then I recommend (before removing the oil pan) renting a mechanical gauge to make sure there is a problem. All you do is remove the present oil sending unit and screw in the mechanical one. If you get to this point, let me know so I can help you through it.

If you have other qustions, let me know.

Joe
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Saturday, January 30th, 2010 AT 1:53 PM
Tiny
MLROESER
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The oil pressure is off scale low. I havent heard any ticking or knocking so I guess I will do an oil change/fliter replacement and replace the oil sending unit. If that doesnt work then I should check oil pressure with a mechanical gauge. Thanks for your help. If I have any questions I will contact you.
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Sunday, January 31st, 2010 AT 2:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
If there isn't noise from the engine, chances are the sending unit is the problem. That is a good thing because the sending unit is cheap.

Let me know what you find and thanks for using 2carpros. Com

Joe
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Monday, February 1st, 2010 AT 7:34 PM

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