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1998 Chevy Blazer high oil pressure

Tiny
KYLEMCNEEL
  • MEMBER
  • 1998 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 86,000 MILES
I have a 98 blazer. When it idles the pressure runs @ 25psi as soon as you give it some gas it jumps up @ about 2000 rpms its @ 80. Any high and the gauge is buried. Now I haven't checked it with a mechanical gauge yet. And I didn't change the pressure switch. This problem seem to happen all of a sudden. What would make the pressure run so high. Usually if the oil pump goes the pressure runs low. So i'm stumped. Any input would help
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Monday, February 9th, 2009 AT 10:21 AM

3 Replies

Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
It could be just your sensor, but have a mechincal gauge installed on it to make sure the pressure is normal. Let me know what you find and ill see what I can do to help
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Monday, February 9th, 2009 AT 3:03 PM
Tiny
KYLEMCNEEL
  • MEMBER
  • 34 POSTS
Ok. Would you have any idea where to hook up a gauge would it be where the pressure switch goes? And if so would you have a clue what the normal operating psi. On the 4.3 vortec. I was thinking 20-60 thanks a ton i'll get back as soon as I can.
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Monday, February 9th, 2009 AT 11:15 PM
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Yes hook it up at the oil pressure sensor area. The psi you said should be close to where you want it
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Tuesday, February 10th, 2009 AT 8:59 AM

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