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
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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