Question about Ford Expedition

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Changed all 8 plugs on a 1998 expecition, then misfires started under load, none supposedly prior. changed all coils, reinspected plugs for damage,crackes etc-changed some again- no codes during first week of reinspection, then p0301 occurred. changed injector, still missing,now p1401,p0307,p0300 started to show up. idles fine, intermitent misfire driving, brake torqueing, flashing fast ses light on ex way. please help

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The first thing I would check is, are any of the plug wires crossed. Your firing order should be 1 3 7 2 6 5 4 8, the cylinders are number front to back passenger side 1 2 3 4, drivers side 5 6 7 8.

Posted on Jul 15, 2010

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