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Oil Pressure Reading at 80

Tiny
DAVID D. AUSTIN II
  • MEMBER
  • 1991 CHEVROLET S-10
  • 4.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 144,000 MILES
The oil pressure gauge is always pinned at 80. I would like to know what the most common cause is for this and whether I need to replace the sensor or the oil pump? And I would like to know how to do it. Thanks.
Saturday, November 26th, 2016 AT 11:48 AM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
With the key in the run position without the engine running is the gauge pegged? If so unplug the oil sending unit and see if the gauge drops if it does bad sending unit replace it. Most common issue is the sending unit.
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Saturday, November 26th, 2016 AT 12:31 PM
Tiny
MATTSCLINE
  • MEMBER
  • 8 POSTS
Any fix? Same truck, same problem. Unplugging oil sender does not change anything, stays at 80. Pull dash cluster and needle does fall, so I do not guess gauge is bad.
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Monday, July 2nd, 2018 AT 4:45 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.
I came across your post and found this test for you to check for an open wire to your gauge. Hope this helps and let me know if you have any further questions. Danny-
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Monday, July 2nd, 2018 AT 11:43 PM

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