engine running poorly

[wdf]

Ar operating temp, should the sensor be closed or open circuit?

[Brian Raymond]

It is always open(kinda,it runs off the ground circuit), but can exceed its parameters. The sensor(if bad) will always default the motor to run rich.Brian Raymond

[CWS_Kahuna]

Thanks Brian. I got my idle set right in that range and my temp is right in there too.

[wdf]

So, at operating temp, can one short the temp sensor lead to ground or unplug it and see if that helps, or is there a resistance value that idicates proper working?

[Brian Raymond]

Bring the motor to operating temp(160-175deg.) on the analog gauge. Shut the motor off, and disconnect the 2 wire sensor, take a ohm reading by touching the 2 test leads to the terminals inside the sensor. As temperature increases, ohms decrease, and vice versa. there is a temp. configuration for ohms to temp., write down your findings, and contact your dealer to see if it is reading correctly. The font on the temp. gauge is to your advantage, if the gauge reads 175deg., a proper ohm reading will put you around 157deg. This is incorporated to read higher, sooner, so if an overheat happens, you will hopefully shut the motor down b4 it is toast. Brian Raymond