Oil Pressure Gauge Bouncing

Discussion in '40- & 55-Series Tech' started by fj40mayo, Sep 25, 2003.

  1. fj40mayo

    fj40mayo

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    I have an aftermarket oil pressure gauge in my '73 FJ40. Parked, the needle is fine and shows the correct operating pressure. When I drive, the needle vibrates and bounces around, but is still near the correct pressure. How do I get the play out of the needle?
     
  2. 76FJ40

    76FJ40 Old Fart SILVER Star

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    If it's an electric gauge, you likely have either a short to ground in the wire to the sending unit or a bad sending unit. If it's a VDO gauge, you can get diagnostic instructions at the VDO site.
     
  3. fj40mayo

    fj40mayo

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    Its not electric. Its got a stainless hose that goes from the rear of the intake manifold (near the distributor) to the gauge. Oil comes thru the hose to the gauge.
     
  4. jm

    jm

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    In the event it's not bouncing 'cuz you bought a REALLY CHEAP gauge... try adding a snubber.

    jm
     
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