1990 loyale

 

I was getting bogus readings from my oil pressure gauge which always showed high pressure with the engine running. The engine runs fine.

 

I changed out the sending unit (twice) and both times get a negative reading with the engine off and just below zero when the engine is running. The relative movement of the needle is about what I would expect between the engine off and the engine running if it were starting out at zero.

 

Is there a way to recalibrate a gauge to zero out correctly ?

Edited August 7, 201213 yr by Dee2

Better off just running an after market oil gage that uses a tube to the sending unit. Don't get a cheap one though as they usually leak.

If it's not starting at zero, you can pull the cover off, and just turn the needle (key off) until it's at zero.

I have never seen a Subaru with an accurate oil pressure gauge. Your best bet is to install a mechanical guage if you want a true oil pressure reading.

thanks Dj7291993.

 

I did get enough dashboard stuff off to get at the needle and like you said I was able to move it with my finger until it would always spring back to a zero resting point.

 

Hooked everything back up and BINGO! the gauge is working in the normal positive range again, instead of the negative range.