It is not impossible that the ECU is bad, but it is much more likely that the thermocouple has gone belly up. You might take the little yellow connector apart and make sure it is terminated right. The other thing you can do to check the ECU is take the thermocouple wire, and cut it about 2" from the connector. Strip back about 3/4" and twist together as evenly as possible, then try heating it. The wire from the thermocouple is ....... you guessed it type K thermocouple wire and will function as a thermocouple as well. This way at least you can verify your ECU is functioning correctly.


David Reid