[87mustang2.3]

so my friend bought a 93 mustang lx and everything works fine except for one thing.....when you turn on the car the tempature shows cold the whole the car is on even after its been on for a while...but when you turn of the car the temp goes up on the gage ..to the actual temp. of the motor....seems to be working backwards if anybody knows what cant be causing this let me know please thanks alot .

[66restomod]

Find the Engine Coolant Temp sensor, if it has two wire going into it, swap the wires and see what happens. If it has one or just a connector, try to find a part number and compare it to a new one. There is Positive Coefficient and Negitive Coefficient ECT's, someone may have installed the wrong one before and its tricking the gauge.

[Protree750]

My educated guess would lead to a faulty temp switch, cheap and easy to replace.

[Amscray88kr]

mine does the same thing.

i should probably look at that since my radiator is leaking lol.
its just the hoses tho.

come on end of the month paycheck!