icp problem?? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 11-30-2012, 01:53 PM Thread Starter
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icp problem??

my truck shakes and has a surging vibration feeling.. when i unplug my icp it gets a lot better so i changed and put in a new icp and harness but it still does it what does that mean or what could be my problem? thanks
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post #2 of 5 Old 11-30-2012, 02:09 PM
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Does you truck shake at idle (more than normal) or does it just occur while driving? If it is while you are driving is it during a certain mph range or anytime within a certain RPM range?

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post #3 of 5 Old 11-30-2012, 02:16 PM Thread Starter
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notice it mostly at idle.. i can feel a little shake between 40-50 mph
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post #4 of 5 Old 11-30-2012, 02:18 PM Thread Starter
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iv had the #8 injector replaced and that didn't do it, then the other day ford replaced the icp and wiring harness and it still does it but when i unplug the sensor the idle problems go away
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post #5 of 5 Old 11-30-2012, 09:02 PM
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you'd need a device capable of reading live data. what you want to do, firstly, is clear the codes set by the disconnected icp sensor. next, run the vehicle with the icp connected. check the codes. then, what you're gonna want to do is view icp pressure and ipr duty cycle. if the problem is related to oil pressure, deciphering the data from those two PIDs should tell you everything you need to know

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