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    Frustrated with rough idle when warm in drive

    Hi all, I have a 2000 Explorer 4.0L V-6 OHV (X) with the CE light on and codes P0306, P0171, P0174. It starts great runs good but has a rough idle stumbling when warm waiting at a light. It has 198K miles on her but the engine has less than 30K. I've done a lot of work on this truck in the past...
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