My pyrometer gauge needle jumps around a lot.....going from a correct reading down to 0.....then halfway...back to 0....to a correct reading....you get the idea...

Could a dirty sensor be causing this? Or do you think it's more likely a bad/intermittent electrical connection?

Any insight would be appreciated!

 

I doubt a dirty sensor would cause that lol, it freakin hot in there so any kind of dirt would be toasted.. but where did you have it tapped?

 

Right here:



Lower left hand corner...

 

^^ it should have been before the turbo, reading might change when the WG opens.. but it could be a bad sensor

 

Interesting! I never thought of that...

 

I could be wrong though, there could be other thing causing it to drop to 0, but its ideal to put the EGT sensor on the manifold before the turbo, its where the heat is at its peak

 

That makes good sense

 

The location won't make the readings jump... it'll just be about 100-200*F cooler than if you had it on the manifold.

Try taking the sensor out and looking at it.. Maybe wipe it down with a rap and reinstall. I would also double check your electrical connections.

 

The only reasonable possibility is an electrical connection issue.

 

Yeah, I'm thinking loose connection, myself....but really wanted other opinions first. Thank you all for the input and the time!

---Paul

 

X2 on the electrical connection. mine was doing the same bouncing around and one prong on my guage connector was loose. Stuck it back in the slot and it's fine now

 

Mine does the same thing. I didn't have time the last time I was in the states to fix it, too busy doing other things to the car. I agree with everyone else its an electrical connection. If it were the sensor it wouldn't be jumping back and reading normal, it would be reading low, high, or not at all.