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Old 03-15-2014, 09:32 AM
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Runs rough and boost problem ideas?

So I have a 2004 f250 6.0 with 170,000 miles. Truck has had oil, oil filters, fuel filters changed 1000 miles ago with all motorcraft. Trucks has a new repaired ficm from Ed at ficm repair. Also has upgraded headstuds.

So I have a few problems. And I'm sure with a few causes just looking for ideas so I can do my research.

Problems are engine surging at idle seems to go away when driving. The surging doesn't push through the brake or anything but I can hear it when at a stop light. Also turbo doesn't seem to want to built boost I have a scangauge 2 and a sct Livewire. Have only ran it on stock tell I get these problems fixed. The truck seems runs fine before it gets to full operating temp. But after then it runs like crap. Also get a puff of white smoke on take off but only happens every once in a while hasn't happened in last three days. And lastly I noticed a odd vacuum like noise on the passenger side of the turbo

And help would be greatly appreciated
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Old 03-15-2014, 09:25 PM
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Probably fuel injector. 1 good misfire will kill boost.
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Old 03-16-2014, 07:43 PM
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Well first off check all your turbo boots there known to have cracks over time which kills boost, after that check the up pipe and see if the firewall is covered in soot which would be a indication of a exhaust leak. If you have access to a real scan tool check for injector contribution balance test to see if an injector is failing.
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