I bought a performance chip that is suppose to connect to the engine coolant temperature sensor on a 95 Mazda Mx-3, 4 cylinder. But i dont know the location of the sensor



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2 Responses to Where Is The Engine Coolant Temperature Sensor On A Mazda Mx3?

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sfurr74

July 9th, 2009 at 10:36 am

Follow your upper radiator hose back towards the engine. The hose connects to the thermostat housing. you should see 1 or more sensors/switches screwed into this housing or very close-by. The temp sensor will have only 1 wire. To make sure you have the right wire and sensor, let the engine warm up enough that the needle on your temp gauge has risen. Shut the engine off, (it is not recommended to plug in or unplug wires while the ignition is on) unplug the suspected wire and turn the ignition switch on. If the gauge no longer reads, you have your wire.
If you can’t find the sensor near the thermostat housing, try looking on the end of the cylinder head opposite the timing belt.

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James M

July 9th, 2009 at 10:36 am

check the repair manual if you have one, or follow the path of the hoses from the radiator, its usually on, or by the thermostat housing

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