normal oil pressure reading at start-up, then pegs out when I accelerate
Mar 1, 2006 at 5:28 PM
GMC High Oil Pressure When Accelerating
GMC
SIRCHILLWILL
- MEMBER
- 1 POST
Normally this is due to a faulty sensor but we need to check that just to be sure.
Here is a guide that will help with this issue of high oil pressure:
https://www.2carpros.com/articles/high-oil-pressure
The way to figure this out quickly is to put a mechanical gauge on the engine and then see if that gauge acts the same as yours. If it does then you have an oil pressure issue. If not then the gauge is the issue.
I am attaching the info below on how to replace the sensor as I am pretty sure this is the issue.
Please let us know what you find with this and we can go from there.
Thanks
Here is a guide that will help with this issue of high oil pressure:
https://www.2carpros.com/articles/high-oil-pressure
The way to figure this out quickly is to put a mechanical gauge on the engine and then see if that gauge acts the same as yours. If it does then you have an oil pressure issue. If not then the gauge is the issue.
I am attaching the info below on how to replace the sensor as I am pretty sure this is the issue.
Please let us know what you find with this and we can go from there.
Thanks
Images (Click to enlarge)
Jul 23, 2021 at 10:40 AM
Suggested Repair
Compare the dash reading with a mechanical oil pressure gauge while accelerating. If the mechanical gauge also pegs high, there is a real oil pressure problem; if it stays normal, the sensor or gauge is faulty. The expert suspects a bad oil pressure sensor and recommends replacing it after confirming with the mechanical gauge.
Conversation Summary
A GMC owner reports normal oil pressure at startup that pegs high when accelerating. The expert says this is often a faulty oil pressure sensor but recommends confirming with a mechanical gauge. Matching high readings indicate a real oil pressure issue, while a normal mechanical reading points to the sensor or gauge. Sensor replacement information was offered pending the test results.