Oil Pressure Gauge Jitters Occasionally

[C4CAMS]

My oil pressure gauge seems to work correctly most of the time. It reads about 40psi at idle and close to 80psi while driving. But sometimes the gauge will begin to jitter and read more than 80psi. After a 10-20s it will read normally again. It seems like an electrical issue, maybe related to heat. I checked the oil pressure sensor connector, didn't see anything obvious, it's dry and seems happy. Is this a known issue?

[lfalzarano]

Replace the oil pressure sensor on the right front of the engine.


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[Z51JEFF]

My 91 does this at Freeway speeds.

[lfalzarano]

It’s the sensor!


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[C4CAMS]

You are correct sir. I replaced the original unit with ACDelco D1808A and the gauge has been behaving.

[Ozruss90]

Originally Posted by C4CAMS

You are correct sir. I replaced the original unit with ACDelco D1808A and the gauge has been behaving.

Am l correct that there are 2 oil switch units. 1 for a low pressure light in the dash and 1 for the pressure gauge?
My pressure gauge is reading incorrectly, usually shows low when it’s ok.
Where can l get the replacement switch from?

Cheers from down under 🇦🇺

[jss06c6]

Originally Posted by Ozruss90

Am l correct that there are 2 oil switch units. 1 for a low pressure light in the dash and 1 for the pressure gauge?
My pressure gauge is reading incorrectly, usually shows low when it’s ok.
Where can l get the replacement switch from?

Cheers from down under [emoji1037]

Jerry Downey has them.. Napa here in the States has aftermarket ones that have worked for me. I believe Jerry ships Int'l..

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[jss06c6]

Yes, there are 2. Oil gauge sensor is on top (easy to change), oil pressure warning light switch is on bottom (more difficult).

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[Ozruss90]

Originally Posted by jss06c6

Yes, there are 2. Oil gauge sensor is on top (easy to change), oil pressure warning light switch is on bottom (more difficult).

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Thanks jss06c6.
Ordered a new one with other items yesterday.

Cheers from down under
Russell