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Re: 2003 Ford Explorer Sport XLT 4.0L w/ P0171
Posted to Technical Discussion Forum on 5/30/2014 2 Replies

A WOT run from standing to shift point should have the O2's railed rich and the Calculated load PID over 80%( according to tech videos that I've seen). If the O2's aren't full rich then it don't have enough fuel and if the calculated load is low then air flow,... Login to read more.

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