Odd Idle Fluctuation - Ford Powerstroke Diesel Forum

 
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post #1 of 8 Old 01-29-2011, 03:40 PM Thread Starter
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Odd Idle Fluctuation

Okay, so today when my truck was siting at idle after I cranked it before hauling my 11k pound horse trailer back home, the idle was not constant, and it kept fluctuating, and it kinda worried me. Made me think I have a fuel issue. The ECT was probably about 130º or so, and here is a video. It did this for about 5-6 minutes, and then I pulled out.


Can anyone tell me what the deal is?

Blake

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2008 F-250 CCSB Dark Copper King Ranch 6.4L FX4
4" MBRP Exhaust w/ Muffler (DPF/DOC Delete), Modded Stock Intake, H&S XRT Pro

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post #2 of 8 Old 06-13-2011, 02:05 PM
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I know this is an old post but did you ever get it figured out?

My truck started pulling this same bull**** saturday morning at the boat launch 120 miles away from home, work or any tools/diagnostics. Now that I'm back home it hasn't missed a beat

Diagnosed a bad ICP sensor today when i got to work. Sensor is not leaking or anything, but definitely on it's way out. Every once in a while you can see a little glitch in the voltage reading

-Matt

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post #3 of 8 Old 06-13-2011, 02:16 PM Thread Starter
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Never got it figured out. It's kinda weird that you say it happened at the boat launch, mine only wants to do it after hauling the horse trailer while idling... Can I check ICP voltage with my Insight CTS?

Blake

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post #4 of 8 Old 06-13-2011, 02:18 PM
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Had the same issue, removed the ICP sensor and cleaned it (not much to clean?) re-installed it and has run fine for a month now

05 f-250 CC
4" MBRP turbo back kitty delete
EGR valve and cooler delete
Cat coolant
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Swamps 58v ficm
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post #5 of 8 Old 06-13-2011, 02:21 PM Thread Starter
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Quote:
Originally Posted by sonds View Post
Had the same issue, removed the ICP sensor and cleaned it (not much to clean?) re-installed it and has run fine for a month now
You make it sound so easy! Mine is on the rear of my engine.

Blake

2013 F-150 CCSB Oxford White FX4 EcoBoost
Loaded with every option...

2008 F-250 CCSB Dark Copper King Ranch 6.4L FX4
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post #6 of 8 Old 06-13-2011, 02:38 PM
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Mine is too. Had to cut up a very pricey Snap On wrench to get it out .. about cried doing it!!

~Blue

2004 F250 4x4 Supercab 6.0 6spd Shortbed
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post #7 of 8 Old 06-13-2011, 02:45 PM
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Yea, I forgot they moved them.

I suppose everything has to come off to get at it.

05 f-250 CC
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post #8 of 8 Old 06-13-2011, 03:05 PM
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oh that's right you have an 03. I would automatically just replace it and if it's leaking put a new pigtail on it. seems like the 03 sensor is much more prone to failure

you don't have to remove the turbo to get it but a few special tools help get it out. you do have to take the ficm out of the way though.

snapon makes a 1 1/16" socket that grips the new sensor and makes installing it a breeze. also a 12pt crowsfoot the same size can help you get it out

http://buy1.snapon.com/catalog/item....re&dir=catalog

http://buy1.snapon.com/catalog/item....e=&dir=catalog

-Matt

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