diagnose a Pyrometer - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 13 (permalink) Old 11-28-2012, 08:37 PM Thread Starter
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diagnose a Pyrometer

I need to be schooled on Pyrometers, mine just quit working, and the needle is pegged, running or not.
how do you trouble shoot/diagnose a Pyrometer?
autometer Z style #2654
its about 7 years old,
The wiring looks good no burn marks or rubbing
its got 12vlt power and a good ground
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post #2 of 13 (permalink) Old 11-28-2012, 08:48 PM
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Re: diagnose a Pyrometer

It has a bad ground.....


My AM pyro and trans temp gauge did that when the ground was bad.
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post #3 of 13 (permalink) Old 11-29-2012, 12:17 AM
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Re: diagnose a Pyrometer

unplug the 2 wires for the probe @ back of guage & ohm them out it will be an open or show n/a i bet if it does then it sounds like you have a broke wire to the probe
if not then leve the meter hooked up & start it & see if the readings change if it does then the guage is bad
just my .02 hope this helps

2000 f350 drw, grages, 4" down pipe, 4" dp back , FRx, 6637 filter, ccv kit, PHP tuner
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post #4 of 13 (permalink) Old 11-29-2012, 03:08 PM Thread Starter
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Re: diagnose a Pyrometer

the power+ and ground- is tied in with the trans gauge, and the trans gauge works fine.
however i will check them out, and will ohm the probe wires.

Where is a good place to order gauges, where did you guys get yours
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post #5 of 13 (permalink) Old 11-29-2012, 03:37 PM
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Re: diagnose a Pyrometer

guages
Riffraff Diesel Performance Parts: - Isspro EV2

2000 f350 drw, grages, 4" down pipe, 4" dp back , FRx, 6637 filter, ccv kit, PHP tuner
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post #6 of 13 (permalink) Old 11-29-2012, 03:42 PM
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Re: diagnose a Pyrometer

Same issue here. Mine was a power wire that wasnt making good connections. Reclampped it and it was fine.

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post #7 of 13 (permalink) Old 11-29-2012, 06:10 PM Thread Starter
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Re: diagnose a Pyrometer

I double checked the power and ground its good right behind the gauge, I checked out the probe wires looks like they could be bad but didnt check it while the truck was running.
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post #8 of 13 (permalink) Old 11-29-2012, 09:46 PM
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Re: diagnose a Pyrometer

what did you get when you ohm the probe wires not running ????????
& why did you not check it running ????????

2000 f350 drw, grages, 4" down pipe, 4" dp back , FRx, 6637 filter, ccv kit, PHP tuner
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post #9 of 13 (permalink) Old 12-01-2012, 01:09 AM Thread Starter
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Re: diagnose a Pyrometer

I got 4.0 ohms with it not running, which now i believe means its ok, I haven't checked it running yet, been really busy and its been raining cats and dogs. Will the ohms change as the probe gets hotter?

Ohh and btw thanks for the heads up on "RiffRaff Diesel" they have the best prices on gauges
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post #10 of 13 (permalink) Old 12-01-2012, 02:09 AM
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Re: diagnose a Pyrometer

there will be less resietance as the probe gets hotter as it is running
& i think around 4 ohms is good (for most )
sounds like the guage is bad

2000 f350 drw, grages, 4" down pipe, 4" dp back , FRx, 6637 filter, ccv kit, PHP tuner
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