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Where is the Coolant Temp Sensor Located

Discussion in '80-Series Tech' started by tomlite, Feb 25, 2004.

  1. tomlite

    tomlite

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    My 1997 Land Cruiser with the 4.5 Litre 6. I am having a problem with a engine miss only when cold and under light acceleration. I want to check and replace the Temperature Sensor that feeds the Coolant Temperature into the engine management computer. I found a single wire sensor, screwed into the block on the intake manifold side just foward of the center line.

    But I believe that the device that I am looking for is a 2 wire device.

    Thanks in Advance,

    Tom
     
  2. firetruck41

    firetruck41

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    I "think" what you found was a knock sensor, but I am wondering the same thing as I have a temp sensor code. I am awaiting my Factory service manual on order from Cdan. Don't bother with a haynes manual for this I have one and it has no details on the coolant temp sensor other than it is on the intake side of the block, but there are four or five sensors there. Sorry I wasn't much help.
     
  3. ppc

    ppc M Go Blue

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    [quote author=tomlite link=board=2;threadid=12051;start=msg110108#msg110108 date=1077716805]
    My 1997 Land Cruiser with the 4.5 Litre 6. I am having a problem with a engine miss only when cold and under light acceleration. I want to check and replace the Temperature Sensor that feeds the Coolant Temperature into the engine management computer. I found a single wire sensor, screwed into the block on the intake manifold side just foward of the center line.

    But I believe that the device that I am looking for is a 2 wire device.

    Thanks in Advance,

    Tom

    [/quote]


    Do you have this miss when in neutral or park? Is it a miss or more of a stumbling when trying to lightly accelerate? A miss is best described by one cylinder not firing where the stumbling would be multiple cylinders. If it is stumbling, which I had, it could be related to a failing fuel pump.
     
  4. Beowulf

    Beowulf

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    Tom,

    Unless you're very comfortable with your diagnosis, maybe you should post up more details on this engine "miss" as Phil suggested.

    On this forum we have some experienced 1FZ-FE mechanics and many owners that have been with the same 80 series vehicle for 10 years or more. They could save you from a parts swapping spiral.

    You need to give us your vehicle's mileage and those things that have already been checked. For example, we would need to know the status of the normal tune up items. Plugs, dizzy, wires, etc.

    If it runs rough you may try the fuel filter as suggested by Phil or maybe some fuel system cleaner.

    -B-