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2006 Ford Explorer Question: poor driveability,hesitation,a buzzing noise

 

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Lacoy, 4.0L V6, Colebrook, NH, July 21, 2009, 05:10
 Rookie

when the transmission shifts I hear a buzzing noise and the engine hesitates usually under a load but also on flat smooth roads.buzzing noise sounds under the hood andstops when load equlizes.I have changed the PCV valve and spark plugs but no improvement. Thank You for Your thoughts.

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  • Answer #1

    July 21, 2009, 10:38
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     Journeyman

    Is the check engine light on? It would really help to diagnose this type of problem if you check for trouble codes. Have you tried this?

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