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Oil Pressure Warning Light

Discussion in 'Technical Q&A' started by John Dillinger, Aug 29, 2004.

  1. John Dillinger

    John Dillinger Karting

    Nov 13, 2003
    68
    Clearwater Florida
    90 TR

    Finally had a chance to take the car out this weekend - sat for two weeks - notice the pressure light coming on above 4k - check oil level, seem to be a little low so i topped it off - after letting the oil warm to 210 i ran it up passed 5k where everything seem to be fine - then back to normal driving and the light came on again passed 4k ....

    Dont understand why its coming on - do i need to add oil to bring it up closer to Max ? ?


    Or is there some adjustment that needs to be made ?
     
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  3. delaney

    delaney Formula Junior

    Nov 8, 2003
    658
    St Petersburg, FL
    Full Name:
    PETER DELANEY
    Maybe a faulty sender.

    Hook a mechanical gauge up and see what happens. Did that to my 355 and found the gauge to be off by ~ 25 psi.

    Pete
     
  4. John Dillinger

    John Dillinger Karting

    Nov 13, 2003
    68
    Clearwater Florida
    where do i hook up the mech gauge ?
     
  5. delaney

    delaney Formula Junior

    Nov 8, 2003
    658
    St Petersburg, FL
    Full Name:
    PETER DELANEY
    I'm great at making suggestions .....

    I have a 96 355, and the way I did it was to remove the sender unit ... just south of the oil filter, then bought a crossover to get from the 'sender thread' to the standard thread of mechanical gauges from places like Autozone etc.

    I'm not familiar with the TR set up, but a good start would be close to the oil filter.

    My biggest challenge was to find the crossover.... metric to pipe thread.

    Regards,


    Pete
     
  6. Michael Collins

    Michael Collins Formula Junior

    Apr 6, 2004
    272
    Shanghai/Melbourne
    On my 308 the no oil pressure light switch started to leak oil through the switch just after start up causing the light to come on as pressure built up then at idle it would sometimes go off as the pressure fell. Easy to see as there is oil all over the top of the engine. Changed the switch, problem solved.
     
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  8. Steve Magnusson

    Steve Magnusson F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    19,282
    Texas
    Full Name:
    Steve Magnusson
    What's the analog oil pressure gauge doing? If it's behaving OKish, I think you can replace the warning light sender without regret. If it's telling you the same thing that the warning light is (no pressure at higher RPM) -- not good...
     
  9. John Dillinger

    John Dillinger Karting

    Nov 13, 2003
    68
    Clearwater Florida
    no the gauge is telling me im at 85 while at 4k rpm;s so its quite high - not low
     
  10. GaryReed

    GaryReed F1 Rookie
    Silver Subscribed

    Feb 9, 2002
    3,070
    Seattle
    Full Name:
    Gary
    John,

    Just curious.... you had posted a tech question about your 1984 Boxer on another thread. (http://ferrarichat.com/forum/showthread.php?t=29314)

    So, do you also own a 1990 TR??

    Gary
     
  11. John Dillinger

    John Dillinger Karting

    Nov 13, 2003
    68
    Clearwater Florida
    my business has an 84 BB512i and i have an 90TR
     
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  13. John Dillinger

    John Dillinger Karting

    Nov 13, 2003
    68
    Clearwater Florida
    Business partner - i meant to say
     

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