Quote
There are 2 coolant temps on the stat housing. As well as the 02 sensor they all control stuff on the carb if I rember correctly. Swap em out cheap see if it helps.


Some have 3. On mine (I have 3..1988 SPX) one is a ground cut-out for the AC, if the coolant temp reaches a given point the ground path for the AC compressor opens and shuts the AC down. This one is mounted above the thermostat on the actual thermostat cover.

#2 is a single prong deal, feeds the temp gauge on the dash. Screws into the intake on mine, mounted very low under some vacuum related switches.

#3 is a two-pin thing that feeds the ECM. Also screws into the intake just below the thermostat, this one gets a coolant temp signal whether the thermostat is open or not.

Chris