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Well not really sure how good of a job I am going to do explaining this, but here goes. Last night was the first real cold night of the year. So I new it was going to be cold so I took the truck out for a little warm up spin last night to clear the windshield and unthaw the wipers, drove just fine. Well I get up this morning and start the truck fine, Little grumpy but it starts just fine. I let it idle about 5-10 min and I go out to start the morning commut. At first the truck was running and didn't seem to want to build boost at first, then the boost would all of a sudden kick in and sometimes go to 30psi(the highest I ever saw was 26) However it didn't seem to have any power even when the boost was this high. I can hear what sounds like the boost fluttering out what seems like the driverside and the truck "misses." Now when I get on the pedle , the boost flutters really bad as if it is building and just letting the boost out immediately. Any help would be appreciated before I take it to Ford, plus I have 64K on it and never had a problem before.