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Re: 2001 Ford 5.4L Supercharged F150 P0171 Only
Posted to Technical Discussion Forum on 8/30/2007 1 Reply

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Bingo! I've seen 2 like that in the past 3 months. Also Doug, you may have mentioned this in the original post, but did the FT change off idle? If not I would definately suspect a restricted exhaust ... Login to read more.

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