EGT Gauge

[Foamy]

I have a Auto Meter Ultra Lite pyro gauge and since yesterday the gauge is all over the place. It will read a max of 800°f but getting there or any throttle input will cause the needle to jump around like crazy. I went out and bought a gauge and probe kit to replace either part. Before I take apart my 3 gauge mount(stupid me not leaving enough extra wire when I first installed them), or crawl under my truck in -12° to replace the probe, I was hoping for some input?

What do you all think it would be. Probe or Gauge that is no good? Hoping the probe then I will have another gauge to install for the egt on the right side of the truck when it warms up.

[dieseldan2005]

Not too sure on the auto meter. My isspro pyro would jump around when it was super cold outside. It would do this until the probe warmed up, so maybe its your probe.

sounds you have a wireing issue... check you hot feed and check your ground

[Foamy]

It was working fine at -40, but I guess the probe could have failed. I was not looking forward to replacing the probe today but I will consider it if the wind chill goes away.