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i have a 02 expedition 4.6 65,000 miles. i changed the plug and the coil my obdII still reades p0303.i dont no what else to do.also is # 3 on passenger side need to be sure. i also switched back to motorcraft plugs.my code reader has that code p0303 and pending, i guess thje next cycle.
Last edited by donnj; Oct 26, 2005 at 06:06 AM.
Reason: forgot
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i have a 02 expedition 4.6 65,000 miles. i changed the plug and the coil my obdII still reades p0303.i dont no what else to do.also is # 3 on passenger side need to be sure. i also switched back to motorcraft plugs.my code reader has that code p0303 and pending, i guess thje next cycle.
Yes the #3 cylinder is on the passenger side (right bank). Ususally I would think a bad coil would cause this problem but it sounds like you have already swapped it out. You could try switching the coils on the #3 and #4 cylinders and see if it will start the miss on #4 instead. That would tell you that the #3 coil (the one that you moved over to #4) is bad. Good luck!