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post #1 of 14 Old 05-31-2009, 09:05 PM Thread Starter
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Question about pyrometer

I'm having problems with my pyrometer, it works for about the first 5 min after starting the truck then quits. Once in awhile while going down the road, it works sporadically then quits again. I've checked the connections and they seem to be okay. I have the control module piggy backed onto the control module for the transmission temp, is there any chance that it can be causing interference? I'm a little baffled so any help would be greatly appreciated. BTW, I have the ISS Pro gauges.
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post #2 of 14 Old 05-31-2009, 09:07 PM
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i'm not 100 percent sure, but i have heard of other electronics interfering with gauges.....i would seperate them and see if that hepls.....good luck!

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post #3 of 14 Old 06-01-2009, 07:57 AM
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Yup, you need to keep them at least 4" apart. Also check the connections between the amplifier box and the gauge. Does it drop to zero when it quits, or just stays in the location it was in?

Regards,
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ISSPRO Engineering Manager

1995 F350 PSD CC DRW, 271k miles
10 ISSPRO Performax™ gauges, Tymar Intake, Gutted EBPV, Tymar 3x4" DP, Tymar 5" exhaust, Cat's lost, Baby Swamps, Swamps tuning, Tricumulator springs and Accumulator Valve, Tru-Cool 4590
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post #4 of 14 Old 06-01-2009, 08:13 AM Thread Starter
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Quote:
Originally Posted by MichaelP View Post
Yup, you need to keep them at least 4" apart. Also check the connections between the amplifier box and the gauge. Does it drop to zero when it quits, or just stays in the location it was in?

Regards,
Michael Pliska
It does drop all the way to zero and stay. I'll separate the two and give that a shot. Thanks!

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post #5 of 14 Old 06-01-2009, 07:42 PM Thread Starter
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Okay, so I separated the two control boxes and it worked, for about 15 minutes (10 longer than last time). It came back on about 200 miles later and was sporatic, worked for a few minutes then stopped. I haven't had a chance to check the connections yet so that'll be the next thing. Any other suggestions or input would be greatly appreciated.

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post #6 of 14 Old 06-01-2009, 07:43 PM Thread Starter
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I was really hoping since I posted this in the ISSPRO forum, I would have had response from them (not that I don't appreciate the input so far).

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post #7 of 14 Old 06-02-2009, 04:17 AM
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MichaelP is the guy from Isspro

Typical cummins owner.

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post #8 of 14 Old 06-02-2009, 04:55 AM
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i would say to check connections, then recheck, then do it over again.
post #9 of 14 Old 06-02-2009, 10:04 AM
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I'm as official a response from ISSPRO as you're likely to find I'm the Engineering Manager here.

With the gauge dropping to zero, it sounds like a loose connection between the amplifier box and the thermocouple. This is most common at the connection down closest to the thermocouple, especially if it is the ring terminal type with the shrink tubing over it. Check this connection thoroughly - cut the shrink tubing off, disconnect the screws and nuts, clean the terminal contact points with a wirebrush or sandpaper, and reassemble the whole thing with new shrink tube over it.

Regards,
Michael Pliska

ISSPRO Engineering Manager

1995 F350 PSD CC DRW, 271k miles
10 ISSPRO Performax™ gauges, Tymar Intake, Gutted EBPV, Tymar 3x4" DP, Tymar 5" exhaust, Cat's lost, Baby Swamps, Swamps tuning, Tricumulator springs and Accumulator Valve, Tru-Cool 4590
1998 S&S 9.5' slide-in camper
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post #10 of 14 Old 06-02-2009, 10:22 AM
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