Pyrometer Gauge - Messed Up !!!!
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Elder User
Joined: Mar 2006
Posts: 620
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Pyrometer Gauge - Messed Up !!!!
When I parked at the shop today, I noticed that my Pyrometer gauge is almost pointing strait down. It should sit at about 200 degreee when I turn the key on but it barely moves and wont even go to 0 deg. What do u think ??
Snowboard season cometh..
Joined: Jan 2006
Posts: 5,406
Likes: 1
From: Gulf Coast of Florida
Check your wiring first, especially your ground. Then I'd see if I could borrow a "known good" pyro and hook that up. I'm sure it's possible that the probe has gone bad, but that's highly unlikely.
Snowboard season cometh..
Joined: Jan 2006
Posts: 5,406
Likes: 1
From: Gulf Coast of Florida
Just to be super ****, check voltage at the gauge. I've only seen it once but the wire could be broken inside the insulation. RIDICULOUSLY rare, but still, it's a fairly easy thing to check. If you've got 12v at the gauge post, and you've confirmed your ground is good, then there's one more thing: are you 100% sure you didn't wire it backwards? Had to ask, but if you are, it sounds like your pyrometer is toast.
Laughing Gas
Joined: Jul 2003
Posts: 1,157
Likes: 1
From: Littleton, Colorado
There were a lot of bad Autometer thermocouplers about 1-1 1/2 yrs ago. There was a grounding issue, but if yours was working fine before and then suddenly went goofy, I would suspect a wire problem.
Did you run a dedicated ground wire, or tap off of something?
Austin
Did you run a dedicated ground wire, or tap off of something?
Austin
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Post Fiend
Joined: Jun 2006
Posts: 5,497
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From: Central, Al
if you have a volt meter that can read millivolts unplug the pyro from the gauge and contact the prongs in the plug from the pyro. You should see about 0.01mv at idle and if you step on the pedal it should rise steadily. If it does the Pyro is good and you have a gauge issue.
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Laughing Gas
Joined: Jul 2003
Posts: 1,157
Likes: 1
From: Littleton, Colorado
The reason I asked is that there have been a number of guys with Autometer Pyros that had the same issue as you that was corrected by a good secure dedicated ground.
The ground wire is the most underdone wiring everybody does. I always run separate grounds for accessories and use a wire brush, or at least a sharp object to scuff up the surface where it will be attatched so that there is a fresh non oxidized surface to contact the connector to.
I would check your ground by moving it around while engine is running and see what happens. I know that sounds like overkill nonsense, but most gauge problems stem from poor ground contact connections.
Austin
The ground wire is the most underdone wiring everybody does. I always run separate grounds for accessories and use a wire brush, or at least a sharp object to scuff up the surface where it will be attatched so that there is a fresh non oxidized surface to contact the connector to.
I would check your ground by moving it around while engine is running and see what happens. I know that sounds like overkill nonsense, but most gauge problems stem from poor ground contact connections.
Austin
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
You shouldn't have 12 volts coming from the probe, it creates it own voltage as a byproduct of heat and chemical reaction. The voltage range of most thermocouples autometer uses is 0.01mv-0.9mv.
Senior User
Joined: Jan 2006
Posts: 374
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From: Las Vegas,nv
I have the exact same guage and mine did this. I went under removed the shrink wrap and removed the metal from touching where that connection is as best i could and put the shrink wrap back over and it works fine. Every once in awhile that metal will touch a little and cause the guage to jump up and down. But try that it fixed my guage.