ISSPRO has let me down - Ford Powerstroke Diesel Forum
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post #1 of 25 Old 05-11-2009, 02:41 PM Thread Starter
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Unhappy ISSPRO has let me down

Having some issues with my tranny gauge, upon start up this afternoon the needle shot up to 160 180ish and continued to climb fast, almost pegged the gauge. Truck was in park idleing.
Shut the truck off and started it back up, gauge acted normal, started to drive home from school, made it out of the parking lot and gauge shot right up to 220 and eventaully pegged itself out on the way home.
Initally i thought my tranny was fixin to sh!% on me so i crawled underneath the truck and its barely hot to the touch so i know its a gauge issue. Checked all connections everything looks good.
Anyone got any ideas

99.5 F-250 Lariat 4x4 CC
-Isspro's in A-pillar
-5" TB into 6" miter
-Recon smoked cab lights
-Bullydog "mileage" chip *Matts tunes in 2 weeks*
-Warn hubs
-DIY intake, Foil delete
-Hankook MT 285's
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post #2 of 25 Old 05-11-2009, 02:45 PM
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I don't know man... I have been having problems with my ISSPRO gauges since day 1. About a year and a half ago I installed my gauges and the pyrometer NEVER went passed about 400 or so... After a while I called ISSPRO and they sent me a new gauge and wiring harness, installed both new items, and still NEVER goes passed 400-500... And now in the past month or so my tranny temp gauge is somehow loose somewhere, so it will be at its normal 160, I hit a bump and it will bounce all over the place... 190...220...back down to 160...I am not very pleased to say the least...
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post #3 of 25 Old 05-11-2009, 02:54 PM Thread Starter
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Originally Posted by dmbrichie View Post
I don't know man... I have been having problems with my ISSPRO gauges since day 1. About a year and a half ago I installed my gauges and the pyrometer NEVER went passed about 400 or so... After a while I called ISSPRO and they sent me a new gauge and wiring harness, installed both new items, and still NEVER goes passed 400-500... And now in the past month or so my tranny temp gauge is somehow loose somewhere, so it will be at its normal 160, I hit a bump and it will bounce all over the place... 190...220...back down to 160...I am not very pleased to say the least...
Im not ready to jump all over ISSPRO's a$$ yet as it may be just a simple fix and untill now my gauges have been great. However after spending a good $300 im not gonna let it go unsolved

99.5 F-250 Lariat 4x4 CC
-Isspro's in A-pillar
-5" TB into 6" miter
-Recon smoked cab lights
-Bullydog "mileage" chip *Matts tunes in 2 weeks*
-Warn hubs
-DIY intake, Foil delete
-Hankook MT 285's
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post #4 of 25 Old 05-11-2009, 03:09 PM
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Check all your power leads. I'm running autometer gauges, and nicked a pwr wire, causing a short to ground. It would peg my gauges, and pop a fuse. You may have a similar thing happening. Wiring can be aggravating.

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post #5 of 25 Old 05-11-2009, 03:13 PM
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Check your grounds. Get a volt meter and test the voltage at the back of the gauge.
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post #6 of 25 Old 05-11-2009, 04:26 PM
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What style of gauge are you running? EV or 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 #7 of 25 Old 05-11-2009, 05:18 PM
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Could also be the sender itself not grounded good. I know most of them are a 1 wire sender and it grounds itself when installed.

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post #8 of 25 Old 05-11-2009, 05:35 PM
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Check all of your connections. I had a problem with my trans temp gauge almost exactly what you are describing, it would jump up real high and if i wiggled the wires it would drop back down. It was the butt connectors i used for the extension wire.

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Yeah, I'd probably feel a bit drained after firing twice in rapid succession.
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post #9 of 25 Old 05-11-2009, 06:06 PM
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Quote:
Originally Posted by dhanna6powerstroke View Post
Could also be the sender itself not grounded good. I know most of them are a 1 wire sender and it grounds itself when installed.

Isspro use two wire senders...

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 #10 of 25 Old 05-12-2009, 06:52 AM
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Blowinsmoke7.3's problem could either be an intermittent connection to the temperature sensor, or an intermittent connection between the amplifier box and the gauge head. Most likely culprit is the connection down near the temp sensor, pull it apart and check for corrosion on the contacts. Try scraping the contacts with a tiny screwdriver, then add some dielectric grease when reassembling. If that doesn't fix it, check the resistance of the sensor. Here are the nominal values:
Res Temp °F
1115 100
1293 140
1393 160
1609 200

If it is significantly off of this curve, then you have a bad sensor. If the values look good and the connection is cleaned up but you still have a problem, check the set screw connections on the wiring going into the amplifier box. Next check the connections going into the back of the gauge. If all these things check out and you still have a problem, then it likely has an intermittent connection within the amplifier box.

dmbrichie -
Your trans temp sounds like the same thing as above. The pyro sounds like a bad connection to the thermocouple. Check the connection between the amplifier box and the thermocouple. If you have a good multimeter which can measure down to the millivolt range, try disconnecting the thermocouple and measuring the voltage across its wires. At 290°F (idle for most trucks) you should see about 5.01 mV. If that checks out, along with the connections to the amplifier box, then you probably have an intermittent connection in the amplifier box.

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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