Egt Guage Acting Up

[44pirate]

It's a Greddy 52mm. I replaced the probe with a TRE probe, it worked fine for a couple of months, now the guage reading jumps all around sometimes but mostly reads nothing. I turn on the lights, it jumps to 12 and sort pulsates there. If I disconnect the orange wire it jumps to 12. Help

 

[Lancer14]

Does it also jump or stop when you hit the brakes?
I have an autometer EGT and mine does the same thing. I've seen quite a few posts about this happening with the autometer gauges, but never seen it on a greddy before.
Mine will bounce around or not read anything until the car has been warmed up and driven for about 10-15 mins. I just ordered a TRE probe last week, hopefully the problem won't continue.
I've checked my wiring about a million times and everytime I rewire it I still get the same problem.


Chris

 

[44pirate]

It jumps when I put on the lights or turn sgnal. It never reads anything though. :thumbdown