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2000 Ford Taurus

Question: i have codes p0171andp0174 when start up eng. cold its runs very ruogh.

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thanhwin12, 3.0L V6 DOHC, Miami, FL, January 27, 2012, 06:02
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 Rookie

fell like misfire. after eng. hot runs fine normal.

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  • Medium-star Best Answer
    gmc4me January 27, 2012, 14:32
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     Journeyman

    These are lean condition codes. The most lickly cause of the code is a vacuum line leak, or a failed intake manifold gasket. When the car warms up the parts expand due to the heat so i would lean more towards intake gasket.

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  • Answer #2

    goldenboy April 12, 2012, 19:23
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     Rookie

    running too lean

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