icp fix - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 05-10-2011, 07:47 PM Thread Starter
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icp fix

so truck running reall rocky wont hardly move enginge ligh goes off an don hook up the tuner it tells me p1211 icp above/below desired. so i need a new icp. heres my question ive been thinking about doing the 10k resistor mod. so should i get a new icp and then do mod or will the 10k mod take care of my problems and no need for new icp. i know the 10k mod tricks the pcm to thinking its not getting enough pressure and increase the pressure. so will this fix me and if you have any pros or cons on why i should or shouldnt do the 10k in any event

thanks jim
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post #2 of 21 Old 05-10-2011, 08:27 PM
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That mod is an easy way to blow an icp or IPR o-ring, wouldn't recommend it with or with out a tunner. Get a new icp. Also are you SURE its the ICP?? Is there oil in the sensor where the connector plugs into??
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post #3 of 21 Old 05-10-2011, 08:35 PM
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Originally Posted by 96F350KID View Post
That mod is an easy way to blow an icp or IPR o-ring, wouldn't recommend it with or with out a tunner. Get a new icp. Also are you SURE its the ICP?? Is there oil in the sensor where the connector plugs into??
Even if there is not oil in the sensor doesn't mean its bad. Unplug the sensor and see if the problem goes away. CEL will come on and stay on, but if the issue goes away; replace the sensor.

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post #4 of 21 Old 05-10-2011, 09:34 PM Thread Starter
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there is oil in the plug. from everything ive researched it suggests that the icp is bad. it runs fine for couple days then runs rocky wont move for a few minutes. turn off wait then runs fune for a few minutes the rock again then good. runs good a day or 2 and back again. should i just unplug it and run it for awhile til i either
a. have the problem again
b. run for a week or more unplugged and no problem
what else could it be if not icp?
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post #5 of 21 Old 05-10-2011, 09:40 PM
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Originally Posted by zombiediesel View Post
there is oil in the plug. from everything ive researched it suggests that the icp is bad. it runs fine for couple days then runs rocky wont move for a few minutes. turn off wait then runs fune for a few minutes the rock again then good. runs good a day or 2 and back again. should i just unplug it and run it for awhile til i either
a. have the problem again
b. run for a week or more unplugged and no problem
what else could it be if not icp?
I suggest just replacing it. If you unplug it, the shifting will break your neck. If its not the ICP, it could be the CPS going south.

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post #6 of 21 Old 05-10-2011, 09:43 PM Thread Starter
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I have noticed a couple real hard shifts occasionally lately? Possible connection? So know of where I can get a icp for a good price
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post #7 of 21 Old 05-10-2011, 09:52 PM
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Hard shift accompiny the CEL

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post #8 of 21 Old 05-10-2011, 09:59 PM Thread Starter
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Haven't really noticed a relation with cel ans hard shifts
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post #9 of 21 Old 05-10-2011, 10:07 PM
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You will if you unplug to ICP sensor.

Sr. Engineering Tech/OPS Technician @ Your local cable company.
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post #10 of 21 Old 05-11-2011, 08:29 PM Thread Starter
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so unplugged the icp and still does the rocky running occasionally. so thinking the ebpv?
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