Faulty Transmission Temp Gauge - Ford Powerstroke Diesel Forum

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post #1 of 3 Old 07-31-2009, 10:45 AM Thread Starter
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Faulty Transmission Temp Gauge

I have the EV series tranny gauge, and i believe it is a faulty gauge. The needle jumps all over the place constantly. I have checked and rechecked the wiring for this gauge and still no luck. I just put in a 3,000$ transmission and i would like a tranny gauge that works. I was curious if yall have any kind of warranty on the gauges or anything. I purchased them from diesel manor back in December/January (cant recall exactly). I have emailed diesel manor and get no responses and can not get in touch with them.

Any help would be greatly appreciated

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post #2 of 3 Old 07-31-2009, 11:46 AM
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I have the same gauges also purchased from diesel manor i'm having the same problem I talked to him last week he says its a problem with the amplifier box and is supposed to be sending a new one try calling his tech support line thats how i was able to get ahold of him

early 99 7.3 supercab xlt s/b auto 4x4
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Isspro gauges (boost,pyro,trans temp)
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post #3 of 3 Old 08-03-2009, 12:40 PM
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Yes, you will be covered under warranty. Please let me know if you are unable to get in touch with Diesel Manor for this.

Does it work at all (intermittent problem) or is it always bouncing around?

The most likely causes (in order) are:
1) Corrosion on wiring connector near sensor
2) Failed sensor (intermittent open circuit inside it)
3) Failed amplifier box (intermittent connection inside)

If you could check the resistance with an ohm meter, please do so. You should see a steady reading close to the following values:
°F Resistance
100 1115
140 1293
160 1393
200 1609

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
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