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2009 Ford F-150 FX4 4WD SuperCab 133

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4-Wheel Drive, SuperCab 5.5' Styleside
14 mpg city / 18 mpg hwy

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January 10, 2010, 7:28 am

AutomotiveForums M

Question: Engine missing, running rough

About a week ago, while I was driving, the engine suddenly started running very rough, lost some power, and the check engine light, which was already on, started flashing.

February 12, 2010, 8:39 pm

James9887 M

Check your spark plugs, wires, and coil pack or distributer your problem might be there if not then I would go on to check injectors fuel pressure if its not that then check the engine compression at each cylinder beyond that I would recommend taking it to an ASE Certified mechanic

2/2 users found this helpful.

February 22, 2011, 6:50 am

Darrin T

Which vehicle/engine? If this is the 5.4 in the F150, you most likely have rust buildup in one of the rear two spark plug boots (the two in the very back closest to the cab). The coil packs themselves are expensive from Ford ($100), but you can replace the boots for about $3 each from your local parts house.

1/1 users found this helpful.

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