Pyrometer problem

[Whitetail Addict]

I've noticed lately (last week or so) my pyrometer needle is jumping around. This mostly occurs on the rise (up a long grade) and the needle will jump rapidly 2-300*, if I let out it will drop to 0 instantly then jump back to what I'm assuming is the proper temp. Also if I pull up on the window switch (window is already up) under acceleration the needle will jump.

The gauge was just replaced by Autometer in the spring...could this be a sending unit issue? The sending unit is about two years old.

 

[Noreaster]

check your power & ground wires

 

[Vrabel]

x2. is it a 2 wire? make sure not shorting under hood.

 

[tanlly]

i just had the issue the guy from autometer told me to ground it to the engine on the cylinder head. he said do not ground it to the chassis or battery.

 

[dmaxfireman]

the probe is bad

 

[Whitetail Addict]

Thanks guys.

When the previous gauge went bad the first thing Autometer said was to check ground...I did and it did the same thing. The ground is still hooked up in the same manner. I'll check the under hood wiring.

I have a new probe that came with the new gauge I guess I could try that.

This leads me to another question...I used the clip fix method for the a-pillar and now I am unsure how to remove the a-pillar to run the wires?

 

[dmaxfireman]

save yourself the time, just replace the probe. if that does not fix it i will send you my lucky penny

 

[dmaxfireman]

just pull on the a piller the metal clip will pop out just fine

 

[mmasuperman12]

replace the probe like fireman said, i had the same this happen to me earlier this year. it was the probe.

 

[JoshH]

When I had a ground problem on my pyro, it would be climbing and then all of a sudden drop to zero. I would let out and after the temp dropped back down, the gauge would jump back to the temp where it cut out and continue to fall. Sounds similar to what yours is doing.