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Goofy temp gauge?
Posted 25 December 2012 - 07:19 PM
Got a little runnability issue that is being discussed elsewhere, but thought I'd ask here about another issue.
My temp gauge in the dash rarely comes up off the needle at cold. The T-stat is a brand new OEM unit, water pump is brand new, the fans come on, and I have burped the system a couple of times just to be sure.
Heat/Defrost works AWESOME
Would a bad coolant temp sensor default the fans to constantly on? And if so, why would I occasionally get slight movement of the gauge when sitting for a while?
Posted 25 December 2012 - 08:06 PM
The way these work is pretty simple, as temperature goes up, resistance of the sensor goes down. Cold = high resistance, hot = low resistance.
If the gauge always shows cold that could mean the sensor is bad or there is high resistance between the gauge and sensor. The simple test is to remove the wire from the sensor and ground it. The temp needle should peg hot. If there is a bunch of corrosion on the spade terminal on the sensor that will cause the high resistance which keeps the needle low. Clean it off and cover it with dielectric grease.
Posted 26 December 2012 - 11:07 AM
This will be the one with the brown plug under the intake. the other single spade terminal is for the gauge. The brown one is for the ECU
Posted 26 December 2012 - 11:23 AM
Posted 26 December 2012 - 11:57 PM
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