Dee2 Posted August 7, 2012 Share Posted August 7, 2012 (edited) 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, 2012 by Dee2 Link to comment Share on other sites More sharing options...
desertsubaru Posted August 8, 2012 Share Posted August 8, 2012 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. Link to comment Share on other sites More sharing options...
Dj7291993 Posted August 8, 2012 Share Posted August 8, 2012 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. Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted August 8, 2012 Share Posted August 8, 2012 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. Link to comment Share on other sites More sharing options...
Dee2 Posted August 9, 2012 Author Share Posted August 9, 2012 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. Link to comment Share on other sites More sharing options...
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