ICP Pressure Reads Zero for a couple minutes - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 06-06-2013, 08:09 AM Thread Starter
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ICP Pressure Reads Zero for a couple minutes

I have noticed recently that occasionally my ICP pressure will read zero for a few minutes when I start my truck. The problem is intermittent, so I cannot predict when it will happen nor can I use my scanner to verify that the problem is with the ICP and not my gauges. I have a 3x pillar gauge system, with the ICP measured through an HPOP pressure gauge (reads directly off the ICP) from ISSPRO. The only possibly issues I have noticed with the truck are a slight decrease in power, also occasionally, but not necessarily with the "zero ICP pressure" symptom.

1997 F250 4x4
Mods that have been done to the truck: 3" turbo back exhaust, Tymar intake, TS-6 Chip, EVPB Switch as exhaust brake, 1.0AR turbine housing, HPOP line crossover

New parts on the truck since the last year: fuel pump, fuel filter, IPR valve, belts, all fluids with SCA, all filters, All fuses checked, batteries, starter, battery cables to come. (just listing everything for completeness).

If anyone has had this problem before with varying power, please let me know. I plan to take out my chip and double check the connections. I just find it strange that this problem is intermittent if it is an electrical problem through a connection since the connectors are so light and probably don't move. The chip is also taped down. Any help is much appreciated.
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post #2 of 6 Old 06-10-2013, 01:05 PM Thread Starter
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Nothing at all?
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post #3 of 6 Old 06-11-2013, 06:23 AM
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I would get a Snap-On, AeroForce, AutoEnginuity, whatever, and find out what the PCM is getting for ICP during this time. That would tell you if the gauge is somehow not reacting when it should.
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post #4 of 6 Old 06-11-2013, 06:59 AM Thread Starter
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Okay, great. I'll try that when I get a chance. When ICPs fail, aren't they supposed to leak oil or something? I read that earlier on here.
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post #5 of 6 Old 06-11-2013, 09:32 AM
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That's one way in which they fail. No doubt they can also fail electrically without ever showing any external signs such as leaking oil. Still, worth pulling the connector and inspecting.
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post #6 of 6 Old 06-20-2013, 03:52 PM Thread Starter
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So, No problem with the gauge as far as I can tell. Maybe I'll just replace the ICP. Sucks that they are expensive though...
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