[RockinJW]

Hey I got a question, I helped a buddy install his gauges on Thursday. Today his pyrometer needle started jumping around, back and forth.

Is that a ground issue? Or something else? I'm just trying track down the problem before I tear into it to fix it.

 

[bigrpowr]

sounds like a ground.

 

[MrPlowJr_EZ_V]

MY guess is ground, but also check the back of the gauge, sometimes the power or dimmer lead will cross somthing else and make it act wacky.

 

[RockinJW]

The needles on the other gauges aren't jumping around, so I'm more inclined to think it's on the backside of the pyrometer itself.

 

[zaner]

Mine does it every now and then, especially when it is raining. Dont know why- but it hasnt done it lately

 

[DarkShadowDiesel]

could be a ground, could be the gauge. my autometer does this - second z-series pyro i've had. replaced it and worked fine for awhile, now it does this and i know for a fact it's reading high. if it's an autometer, call them they'll probably replace it, that's what they did with mine.

 

[RockinJW]

It's a DiPricol Optix

 

[DarkShadowDiesel]

then i would do as the others suggested. the only reason i mentioned the autometer is because i believe they recalled some of their pyros. hope you get it ironed out!

 

[spdiesel]

Pyrometer circuits are sensitive instruments that amplify uV/mV signals into something the gauge can read...Electrical noise, grounding issues, partial circuit failures can all be to blame.

I would start troubleshooting in this order.

1.Change the ground/check the ground.
2. Look for things in the wiring that can give off noise and give your pyro a fit. If you see something obvious move the wires or install some chokes on the line to help suppress noise. in this instance, near the gauge would be better.

3. if all else fails ask the manuf if it's possibly a bad gauge.

 

[RockinJW]

Thanks guys, I'll check it out tommorrow afternoon. The power wire runs directly from the fuse panel below the steering wheel to the gauge in the a-pillar.

He said it's only done it once, so I'm concerned I can't get it to do it again. I'm going to move the ground and see what happens. If the pyro works right after that, I guess that was it.

If it still bounces around I'll check into the gauge being faulty...

Thanks for the input...

 

[Blackcloud2k]

[ QUOTE ]
Thanks guys, I'll check it out tommorrow afternoon. The power wire runs directly from the fuse panel below the steering wheel to the gauge in the a-pillar.

He said it's only done it once, so I'm concerned I can't get it to do it again. I'm going to move the ground and see what happens. If the pyro works right after that, I guess that was it.

If it still bounces around I'll check into the gauge being faulty...

Thanks for the input...

[/ QUOTE ]

Just out of curiosity does he have a CB radio in his truck? My optix pyro jumps around when I key up the mic, and I cant figure out why it does this since the power and the ground wires for the cb and the guage go to completly different power and grounds.