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Old 09-27-2007, 04:24 PM
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04 6.0 No Power and Rough Idle

I have a 2004 6.0 and when I start it up after it has set for a few hours it idles rough and has no power. But once the engine temp. gets to the thermostat set temp. it idles fine and has all the power. Has anybody had this problem or know what the problem could be?

Thanks
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Old 09-27-2007, 04:27 PM
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Not sure what it could be, mine only does that in the morining when it's been sitting all night. Keep checkin back though I'm sure someone will know.
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Old 09-27-2007, 04:33 PM
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How often do you change your fuel filters? Any smoke? If so what color? Will it rev all the way up in drive/in park?
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Old 09-27-2007, 04:39 PM
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Filters were changed last week, no smoke and it rev's up but rough. This problem just started monday.
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Old 09-27-2007, 04:55 PM
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Filters were changed last week, no smoke and it rev's up but rough. This problem just started monday.
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Old 09-27-2007, 06:32 PM
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I have the same problem on my '03 Excursion. I changed fuel filters adn then this same problem started. I do not have a code reader to pull codes. I am interested in what you find out.

Thanks
Shawn
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Old 09-27-2007, 08:51 PM
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It might possibly need a recalibration for the PCM. It depends whether or not there are any codes stored.
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Old 09-27-2007, 09:36 PM
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Loss of Power

I had a similar problem on a 04' except it only lasted a few minutes. Mine turned out to be a corroded water separator on the fuel filter. You said that you changed the filters which means you most likely drained the water out of the separator, but you might want to pull it out completely to check for corrosion on the other side of the plate. There are only 4 screws holding it on so it only takes a few min. to do the job. Since this is an 04', is it under 100,000 miles? If so it is still under warranty and the fuel system is covered. Just a thought... At a minimum you could take it in for a diagnositic for the $100 deductable.
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Old 09-28-2007, 12:52 AM
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Here try this link, I just finished going through all that. Rough idles, white smoke, no power etc.

Picking up my truck!!!


Good luck and hope u have warrenty. other wise you might be doing injectors soon.
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Old 09-28-2007, 04:59 AM
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Thanks for the replies, I will look at these issues and see what I can find this weekend.
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