Question about 1999 Jeep Wrangler

2 Answers

What could be causing this?

Oil pressure drops at idle. Low enough for light to come on. Fine while running

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  • Jeep Master
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Great post. but no engine stated. 2.5L? 4.0L?
ok.

  1. what is rpm at idiott lamp on? 800 or 400?
  2. what oil, 0w?
  3. how old is oil, 6months 6 years.?
  4. use a real pressure gauge yet, to see if switch is bad?
  5. the switch on most cars can come on 3 -5PSI (its a useless device really, as that is WAY too late a warning , IMO
  6. use a real test gauge in place of the switch ? for testing or full time on a Tee fitting, or get a real gauge that has programmable trips.

Posted on Aug 07, 2015

  • Anonymous Aug 07, 2015

    the first task is to see if its real.
    if real then , you have bearing clearance issues. or wrong oil. or clogged pump screen,etc
    if not real, then fix that.
    not real, as in the pressure switch is bad.
    (dirt cheap switch )

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  • Jeep Master
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Oil level, pressure,viscosity and possibly gauge/sending unit.

Posted on Aug 07, 2015

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