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Oil Pressure & Temp gauge ?s

Discussion in 'General Explorations!!' started by V8Pete, September 15, 2002.

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    1. V8Pete

      V8Pete Active Member

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      1) My temp gauge has always slowly fluctuated between ~ 1/4 and 1/2, as the thermostat opens and closes. Now it jumps around in this range, as if it's got a short or bad connection. Has anyone else experienced this? If so, what's the fix?

      2) The oil pressure gauge is set up like an idiot light - that's why the oil pressure never shows any variance. Has anyone changed the sending unit to make the gauge work like a gauge? If so, what kind of sending unit did you use?

      Thanks!
       
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    3. X24

      X24 RAMajama

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      I put on another sending unit in addition to the stock one and have a digital oil pressure gauge.
       
    4. V8Pete

      V8Pete Active Member

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      Anyone?
       
    5. daniel cauchon

      daniel cauchon Active Member

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      well If I look at mine the oil pressure never realy moves..should it be ? it always stays in the middle when it`s on.
       
    6. Maniak

      Maniak Moderator-Stock 91-94 Staff Member Moderator Elite Explorer

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      Assuming the 2nd gen has the same issues as the first Generation Explorers.. Your sending unit is just a switch..

      closes at 5psi (some have said 8).. and open at anything lower...

      there is a 20 ohm resister behind the gauge that makes it read in the center of the gauge when the switch is closed...

      If you replace the sending unig with a real oil pressure switch AND short out the 20ohm resister you will have a real oil pressure switch...

      There is a long thread called "fake oil pressure switch) with much more information..

      I bought a Neihoff pressure switch..
      p/n :ff133e
      some of the other part numers on the box are...
      Gen: op24761
      SMP: PS-60

      Until you do the change.. the oil pressure gauge only changes because of changes in voltage from the battery and not from changing oil pressure.

      ~Mark
       
    7. V8Pete

      V8Pete Active Member

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      Mark:

      Thanks for the reference to the other thread. A wealth of information there. I'll do the sending unit now, and maybe the resistor later.

      Pete
       

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