pyro gauge probs

[0013]

my egt gauge sometimes works--sometimes doesn't. when it doesn't its stuck between 500-600 degrees and doesn't zero out when i turn the truck off. any ideas or ways to check the ohms or something? im thinking its the thermocouple.

TIA,

chris

 

[Davidson]

chris, what kind of gauges do you have? I just installed an X-Monitor and have the same problem. When I start it up cold, its between 500-600 and then it goes nuts as the truck warms up. I am almost positive it is the EGT probe and they will be sending me a new one on Monday and then I will know for sure. If I unplug the probe the reading goes to zero. Larry

 

[0013]

i have used autometers. guess it'll be a new thermocouple for me. anyone know where to get one??? TIA, chris

 

[pwerwagn]

Also, check the bulb. If the bulb is too large, it will cause the needle to stick right in the 5-700* range. My isspros used to do it, that is how I know.

--Jeff