I can't figure this out...I had a plug come loose behind my pillar mount causing my EGT gauge to sporatically quit working. The two prong plug from the EGT probe came loose. So I put it back together. It's working again but the gauge seems to be reading about 100 degrees low...says the truck is idling at approximately 175-200 degrees, which I know to be wrong. Is there a way to recalibrate the gauge or did I fry it? Could a ground problem cause this? I've never had one do this before.

 

No one's had this problem? Checked the wiring/grounds and no change. Guess I fried the guage/probe some how.

 

at Idle the temp shouldn't be too hot anyway I have Isspro and it's not any higher