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  #1  
Old 12-21-2007, 01:00 PM
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surging idle

I have a 2004 f250 6.0 diesel truck. I have a problem with it. I stop at a red light and the truck idles up and down. Sometime I press the gas pedal and there is no go but the truck never dies. After a few seconds it takes off like nothing was ever wrong. I had the fuel injection cleaned, EGR replaced,ICP sensor replaced,EGR passage decarbonized,gas pedal assembly replaced and TSB done in the last week. It's still doing the same thing.Can someone help me with this???????

Thanks,
Terry
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Old 12-21-2007, 07:11 PM
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Any codes?
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Old 12-21-2007, 07:19 PM
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being that its an 04 model, i would guess wiring harness chaffed if youve already replaced all those components , 04 models were the worst for wiring problems, may want to look the harness over good ,was curious about the codes if any myself
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Old 12-22-2007, 07:16 AM
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Here is what I got from the dealer. I believe this is the codes they pulled when it was in the shop. PO488,PO404,P2284,P2286,P2287 and performed TSB 07-21-09 reflashed PCM TCM FICM. The parts replaced sensor asy 240941,connector-3-1720,valve asy-mo 1526....Thanks Terry
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Old 12-22-2007, 07:25 AM
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p0488 is a calibration issue which should have been fixed with the reprogram

p0404 is definitly egr valve problem

the rest are all curcuit codes for the icp sensor
if it still isnt running right , have the codes cheked again after some driving and if any of these are there , you probably have a wiring problem
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Old 12-22-2007, 07:32 AM
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Thanks for the info. Would the wiring problem be under warranty that I should have the dealer look at?
Thanks again
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Old 12-22-2007, 07:35 AM
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yes the engine harness is covered
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Old 12-22-2007, 07:42 AM
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Thanks Scuffy828 for the info. This is driving me crazy and broke. I hope they can find the problem wiring is the worst problem to have I've heard. Have a Merry christmas and happy new years............Terry
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  #9  
Old 12-22-2007, 08:04 AM
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there are 2 harnesses the engine harness and the ficm harness , they both have been known to give problems with that model
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