Troubleshooting Gauges - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 07-10-2014, 11:17 AM Thread Starter
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Troubleshooting Gauges

I tried searching but couldn't find anything similar to my issue. I have ISSPRO EGT Boost and Trans temp gauges on my 2001 7.3 and have a few problems.
The EGT gauge quit on me bit for a while after it would react extremely slowly and I have no idea as to the accuracy. I did pull the probe and clean it and it reacted slowly for awhile then quit again.
The Trans Temp gauge likes to freak out and the needle does all kinds of weird motions. I verified through my monitor that that the trans didn't blow up when it did it the first time.
Can anybody point me in the right direction as to where to start? I'm mot an electrical guru so I don't know if I should look at the gauge, probe, wiring, etc........


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post #2 of 16 Old 07-10-2014, 02:26 PM
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Originally Posted by USMC2001PSD7.3 View Post
I tried searching but couldn't find anything similar to my issue. I have ISSPRO EGT Boost and Trans temp gauges on my 2001 7.3 and have a few problems.
The EGT gauge quit on me bit for a while after it would react extremely slowly and I have no idea as to the accuracy. I did pull the probe and clean it and it reacted slowly for awhile then quit again.
The Trans Temp gauge likes to freak out and the needle does all kinds of weird motions. I verified through my monitor that that the trans didn't blow up when it did it the first time.
Can anybody point me in the right direction as to where to start? I'm mot an electrical guru so I don't know if I should look at the gauge, probe, wiring, etc........


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What version of gauges do you have? Are they EV, EV2 or Performax?

01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
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post #3 of 16 Old 07-10-2014, 03:25 PM Thread Starter
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Troubleshooting Gauges

Performax. Had a pic somewhere but cant find it.


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post #4 of 16 Old 07-10-2014, 07:02 PM
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I'm sure Joe will provide better insight, but I would start by making sure you have clean, solid grounds.

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post #5 of 16 Old 07-10-2014, 07:04 PM Thread Starter
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Good to go thanks guys. Sometimes the trans temp works fine other times it freaks. I definitely want them working again soon. Ill start digging when I get home and give you guys more info


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post #6 of 16 Old 07-10-2014, 07:14 PM
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Do you have the right gauges hooked up?? I had mine reversed the first time after that they worked fine.

Just an idea

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post #7 of 16 Old 07-10-2014, 08:17 PM Thread Starter
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Hahaha yea I do they worked great for a long time somethin has just gone wacko. What exactly did they do when you had them hooked up wrong?


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post #8 of 16 Old 07-11-2014, 05:51 PM
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Hahaha yea I do they worked great for a long time somethin has just gone wacko. What exactly did they do when you had them hooked up wrong?


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The EGT moved really slow and the transmission never moved

2001 7.3L CCSRW 4X4
Airiad Intake 4" Flo-Pro Exhaust
ISSPRO EGT/Transmission
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post #9 of 16 Old 07-11-2014, 06:09 PM Thread Starter
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Haha thats funny. Thankfully my trans temp moves and is accurate sometimes but other times it goes ballistic.


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post #10 of 16 Old 07-14-2014, 03:09 PM
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To confirm you have PERFORMAX gauges, with a computer box mounted under the hood?

01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
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