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Re: Ford 4.6 backfire on startup & wierd fuel trims
Posted to Technical Discussion Forum on 11/28/2007 4 Replies

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I had a similar concern with a 4.6 in an F-150 several years ago. Hard start, run rough cold only, skewed fuel trims cold only, I don't remember the MAF, and once it was warm it ran fine. You could s... Login to read more.

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