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post #1 of 10 Old 03-01-2010, 07:00 PM Thread Starter
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randomly shutting down

Alright well my issue still stands im driving along at any speed and randomly it doesnt do anything like someone turned off the diesel pedal and the wait to start light comes on after a couple seconds everything is back to normal but at slow speeds under 10 mph the truck turns off completely but always starts right back up is this the icp sensor possibly or what can it be its getting progressively worse so i really need some help

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post #2 of 10 Old 03-02-2010, 11:36 AM
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Have you checked out the wire harness yet? that woudl cause an intermittent problem, check back by ficm unit. Also i had an EGR valve bad that once did this. Shut down twice on me and would stummble on acceleration but only once in a while.(still dont know how a bad egr would cause it to shut off but thats what the dealer said it was) Took it in they replaced the EGR and was good to go. Do you have a way to check for codes? Icp could cause this as well but i would think it would go completly out very soon and just not start back up.

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post #3 of 10 Old 03-02-2010, 01:09 PM Thread Starter
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I couldnt find anything loose and it has gotten worse causing it to randomly shut off so today i put in a new icp sensor and it was a B@#$% but is like a one hour job so we will see

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post #4 of 10 Old 03-02-2010, 08:27 PM
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fix

if is a late build engine icp in the right valve cover. with the truck running press on the wiring harness near the ficm and see if it trys to cut off seen 3 at the dealer doing this and was an sob to find the first time . good luck
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post #5 of 10 Old 03-02-2010, 08:39 PM Thread Starter
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its an early build but im hoping that the icp sensor fixed it but we will see other wise ill check into the ficm and wiring

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post #6 of 10 Old 03-03-2010, 05:36 PM Thread Starter
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yeah the icp sensor didnt work so now what thinking about sending the ficm to get repaired opinions?

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post #7 of 10 Old 03-03-2010, 06:03 PM
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Cool

Check Ficm voltage first writeup in here somewhere how to. take it out if the voltage is low, print out the directions and pics take it apart and find you a good tv repair man that has good eyes and can solder show him where and what to fix ,put it back together put back in truck should be good to go. all in same day. No need to send it off.
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post #8 of 10 Old 03-03-2010, 07:06 PM Thread Starter
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i thought about that but was worried about it getting jacked up so i was considering it getting profesionally done

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post #9 of 10 Old 03-04-2010, 08:20 AM Thread Starter
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o and the truck is throwing zero codes and the connections to the FICM look good and feel good

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post #10 of 10 Old 03-04-2010, 05:57 PM
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your not looking just for loose connections but rather wire chaffing. definatly test the ficm as stated above but also try lifting the harness off the engine block down under the ficm and tie it up there is a stud down there that rubs through. also look by the parking brake/brake peddle area there is some rubbing on the wires there as well. If you hunt around you will find a thread that had a link to somewhere that has pictures and locations of the common spots. good luck.

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