Pyro Gauge stops at 100 degrees? - Ford Powerstroke Diesel Forum
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Old 08-19-2008, 04:22 AM Rookie

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Pyro Gauge stops at 100 degrees?

Hi Guys,
Installed my new gauges and everything seems to work correctly. The problem I have is When I turn on the key the Pyro gauge snaps to 100 degrees and goes up from there once truck is started. Readings appear to be correct, idles at about 400 degrees and cruises at 6-700 degrees. I read a lot of different posts that some go to 0 and some stop at 100 degrees when key is turned on. I'm running Autometer Ultralite gauges. Is this a problem or is it normal on these gauges? Any ideas.
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Old 08-19-2008, 04:27 AM
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Mine pops up to about 100 also but down here in tampa in the middle of the summer I am sure it is atleast that hot under the hood already. now is that the reason it happens I have no idea. but I know it works right and I checkit it with a temp gun and it was dang near spot on.
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Old 08-19-2008, 04:29 AM


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I dont think its a problem. The gauge is reading correctly going down the road and such as from what you have said, so I would think its ok. if its electrical gauge, depending on how you hooked it up would depend on if it snaps to 100 or not I think. Kinda like a monster tach. MY monster tach in my car always was at like 3500 or so, key off, and when key was on, it would snap back to 0
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