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Your car has two sensors, one is for the ecu and one is for the dash. With a thermometer verify the temperature. I would also check the coil pack with a multimeter when it’s hot and cold and compare the numbers. Wouldn’t be a bad idea to do a compression test as the 3.8 has a tendency to blow head gaskets.


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The single wire is probably for the gauge, that’s how the pushrods are set up anyway. I’m not too familiar with the 3.8, I owned one years ago but I never really messed with it.


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