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2003 sport trac lean codes

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    2003 Sport Trac Lean codes

    As we've all come across those pesky lean codes, P0171 and P0174....I have seen different things to troubleshoot the problem from MAF sensor dirty, to PCV valve dirty to a vacuum leak in the elbow going to the PCV valve. Well, I did all the above, I cleaned the MAF, replaced dirty PCV valve and...
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