Gentlemen: For approximately six months now I have been dealing with an apparent overheating problem. I say apparent because I do not believe the car is actually overheating. It is not losing water, no oil in the water nor water in the oil and temp confirmed with a IR temp gun (nothing above 180 F). Temp gauges reads approximately 225 degrees F. Today I changed what I thought was the temp probe in the valley for the engine behind the oil filter. With the probe out and the ground disconnected the temp gauge did not work. After putting the bloody thing back together I found I had left the single wire to the probe disconnected. The gauge worked, can this be right??? Does the gauge get its input from the probe in the valley or from the probe just below the thermostat housing?? The disgrams on the Ricambi web site do not show this probe. Thanks in advance.