hello and first of all I would like to thank everyone for the input....here it goes...I got a gauge set of autometer gauges phantoms and the boost and tranny temp work fine, but the pyrometer was working well for about a month then the pointer goes crazy and goes round and round...i double checked all wiring and all is good and not loose. Any Ideas?

thanks

 

I had the same problem with mine. I had it attached to a common ground (shared with others). Once I moved the ground to a seperate location it was fine. I have no idea why, it was just a matter of trial and error when troubleshooting.