Question about Ford F-150
171/174 too much oxygen in the exhaust, sounds like you may have a vacuum leak after the Mass Air Flow sensor (MAF). Check for leaks in the intake system. Also the MAF sensor could be dirty, clean with electrical cleaner and make sure that it is completely dry before hooking it back up and testing it. Hope this helps, let me know.
Posted on Aug 23, 2010
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Posted on Jan 02, 2017
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