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Thread: High oil pressure reading

  1. #1
    Senior Member Trstno1's Avatar
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    Location:  Anchorage, Alaska

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    High oil pressure reading

    Hey guys-

    So just this last summer I had changed the oil, oil filter, and oil pressure sender on my car. All through the driving season everything seemed to be operating as it should with idle pressure around 60 and up to just shy of 80 driving under a load. Since then my car has been parked in the garage. I needed to move the car the other day to use the space to work on my daily driver and upon startup noticed that the oil pressure gauge bounced immediately over the 80 psi mark when idling acting like its having a seizure jumping around and pegs maxed out when given throttle. If I shut the car off the gauge rests around 20 psi like normal. What gives? Cold oil? Clogged oil filter? Clogged sender?


    In order to troubleshoot I unplugged the sender and witnessed the gauge immediately peg and not move with ignition and start. I then grounded sender wire and witnessed the gauge go to 0 psi. This would lead me to believe the gauge in the dash is good. I checked the oil level which looked good with a level between the notches like normal. Am I missing a step in the trouble shooting process? Could I already have a bad sender? Or would leaving a car sit in a 55 degree garage thicken the oil to the point of throwing a high pressure warning? I sort of want to let the car idle for awhile to let the oil warm up thus maybe unsticking something that may be gunked up but definitely don't want to hurt the engine. Thoughts?
    Last edited by Trstno1; 01-19-2016 at 02:22 PM.
    You can't buy happiness, but you can buy a DeLorean and that's sort of the same thing....

  2. #2
    Not a DeLorean Guru
    Join Date:  May 2011

    Location:  Rochester, NY

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    My VIN:    01049

    Get an external oil pressure gauge. I think I paid like $20 for mine. Hook that up and see what it says. That'll tell you right away where your issue is.
    -Mike
    1981 DeLorean, heads/cams/exhaust, EFI
    1999 Corvette, heads/cam/exhaust, 440 BHP
    2005 Elise, stock
    2016 Chevy Cruze

  3. #3
    DMC Midwest - 815.459.6439 DMCMW Dave's Avatar
    Join Date:  May 2011

    Location:  Crystal Lake IL

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    My VIN:    05429

    Gauge is good, sender is bad.
    Dave S
    DMC Midwest - retired but helping
    dswingle@DeLorean.com

  4. #4
    Senior Member Trstno1's Avatar
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    Quote Originally Posted by DMCMW Dave View Post
    Gauge is good, sender is bad.
    Thanks for the quick response. Any reason for a sender to go bad that's only 6 months old?
    You can't buy happiness, but you can buy a DeLorean and that's sort of the same thing....

  5. #5
    Senior Member
    Join Date:  May 2011

    Location:  Burnsville MN-Moving to Kalispell MT. in June 20111

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    My VIN:    2691

    oil press high

    Had same problem, had same question, DMCMW said bad sender
    replaced .....all ok

  6. #6
    Senior Member
    Join Date:  Apr 2015

    Location:  Torquay, England

    Posts:    247

    Mines always done this, Starts at 80psi, jumping around, on a long hot run it may drop down to 60psi.
    I just thought it was another Delorean quirk.
    What ideally should it do?
    I loves my grooves!

  7. #7
    Senior Member Trstno1's Avatar
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    Quote Originally Posted by SS Spoiler View Post
    Had same problem, had same question, DMCMW said bad sender
    replaced .....all ok
    ok, guess I'll get a new sender and see what happens. Thanks!
    You can't buy happiness, but you can buy a DeLorean and that's sort of the same thing....

  8. #8
    DMC Midwest - 815.459.6439 DMCMW Dave's Avatar
    Join Date:  May 2011

    Location:  Crystal Lake IL

    Posts:    4,996

    My VIN:    05429

    Quote Originally Posted by Trstno1 View Post
    Thanks for the quick response. Any reason for a sender to go bad that's only 6 months old?
    No, but it happens. Some seem to last forever, some don't.
    Dave S
    DMC Midwest - retired but helping
    dswingle@DeLorean.com

  9. #9
    Senior Member
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    Quote Originally Posted by Trstno1 View Post
    Thanks for the quick response. Any reason for a sender to go bad that's only 6 months old?
    Short answer....Chinese part! They're out there. Buy from trusted source.
    Rob

  10. #10
    Senior Member Trstno1's Avatar
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    Quote Originally Posted by PJ Grady Inc. View Post
    Short answer....Chinese part! They're out there. Buy from trusted source.
    Rob
    Is there any vender selling a sender that's not made in China? If so, how much $?
    You can't buy happiness, but you can buy a DeLorean and that's sort of the same thing....

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