Temp gauge bouncing

Rleptrone Oct 9, 2017

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  1. Rleptrone

    Rleptrone Test Drive

    Messages:
    1
    my daughter called from me college yesterday and said her temp gauge on her '05 4.0L would jump to hot when accelerating and go back to normal when cruising or sitting at a traffic light. She said the AC also started blowing warm air when accelerating. Any suggestions where to start.
     
  2. Prime

    Prime Some Kind of In Charge? Admin

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    33,935
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    Fan clutch is most likely. Could also try looking at the electric helper fan.

    If the engine overheats the AC will run warm.
     
  3. borclok

    borclok Test Drive

    Messages:
    35
    My car is doing the opposite. After driving around for at least 45 minutes, the temp gauge will go up at an idle, and then back down when I get to cruising speed. All fluids are topped off.
     
  4. Prime

    Prime Some Kind of In Charge? Admin

    Messages:
    33,935
    Location:
    Denver-ish
    That almost sounds like a clogged radiator.
     
  5. borclok

    borclok Test Drive

    Messages:
    35
    radiator has already been replaced and it's still doing the same thing ; ;
     
  6. JeffPro4x

    JeffPro4x Hot Pipe Moderator Supporting Member

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    8,492
    Location:
    Glenside, PA
    Fan clutch.
     
    borclok likes this.
  7. JeffPro4x

    JeffPro4x Hot Pipe Moderator Supporting Member

    Messages:
    8,492
    Location:
    Glenside, PA
    This sounds like a low coolant issue to me.
     
  8. Manfred

    Manfred Test Drive

    Messages:
    1
    Our 2007 Xterra started "running hot" with the temp gauge getting into the hot zone while cruising on the highway, dropping at lower speeds with higher RPMs. Replaced the thermostat and the fan clutch (which was bad). Problem remains. I am trying to replace the coolant temp sensor but am unable to disconnect the wire from the sensor on the engine. Barely enough room for my hand.

    What's the secret to getting that wire unplugged so I can remove the temp sensor?

    Many thanks!
     

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