Question about 1997 Ford Expedition

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Code po351 replaced coil and plug on second cylender frm front on passenger side still missing bad.please help.only car

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Seems po351 would be number one cylinder on passenger side. Why not change the coil you put in number 2 hole to number one hole and drive it to see if the code moves to po352 if you don't want to be just buying coils.

Posted on Aug 28, 2012

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It's probably the 4th which is all the way in the back on the left side when you are standing in front of the vehicle facing the engine. There is a water line that runs above that cylinder and drips condensation into it allowing for problems. It's best to replace the plugs AND the (coil pack--which run $60 each).

Posted on Sep 18, 2010

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