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  1. J

    1998 Explorer p0171 p0174

    I replaced the upper intake gaskets today(wish I would have done lower also). Anyway this lady's explorer has from what she said and I observed has a new MAF, 2 new O2 sensors, and a DPFE sensor replaced. I scanned this unit and both LTFT &STFT are showing -100 % no fluctuating! O2 sensors...
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