Yup! Another thread on rough idle! - Ford Powerstroke Diesel Forum
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Old 09-29-2012, 02:57 PM
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Yup! Another thread on rough idle!

I have read through every single post and have done every single thing suggested! From ICP, PCM, IDM, cleaned screens, pulled sensors, valve cover wiring harness replaced, oil change, injector oring's......you name it, I have done it! It runs rough ALL the time. When it's cold, when it's hot...ALL the time! No smoke out of the ordinary and no codes according to ford! The only 2 things I have not done is any type of pressure testing cause I don't have the tools to do that and buzz test. So, now what? Where do I go now?
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Old 09-29-2012, 03:07 PM
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you should definitely get a contribution and buzz test done, is it just rough, or is it knocking?
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Old 09-29-2012, 03:22 PM
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just rough! no knock thank goodness!!
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Old 09-29-2012, 03:23 PM
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strange, sorry wish i could help you out more, but you have already tried everything that i would say. lol
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Old 09-29-2012, 03:24 PM
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I will do the 2 test's this week and hope it's something there. but, thank you!!!
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Old 09-29-2012, 03:26 PM
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do you know your fuel and oil pressure while driving and at idle?
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Old 09-29-2012, 03:28 PM
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nope. that is what i am going to have tested. i don't have any type of pressure testing tools.
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Old 09-29-2012, 05:29 PM
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E4OD OR ZF5?
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Old 09-29-2012, 06:57 PM
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E40d. One of the posts suggested the neutral safety switch. So I started it in neutral and no change.
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Old 10-08-2012, 09:00 PM
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So does it just idle rough or does it run rough too?
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