Rough running

[jorge2006]

I have a 2006 Explorer XLT with a v8 that runs rough and the check engine light is on

Took it to AutoZone they hook it up to their computer and it gave me a code of P0303 misfire detected cylinder #3

Of the possible causes are fault spark plugs... ignition wires... coil ....vacuum leak and high or low fuel pressure

I have replaced all 8 of the coils.. the 8 spark plugs and the #3 fuel injector and it still runs the same. I looked around the engine and it does not seem to have a vacuum leak

I can't seem to figure out why it still runs rough What else can I look for?????

 

[Ornery]

Well,wouldn't hurt to throw a new fuel filter in there.

I'd be tracking down whether the coil and injector are actually getting their voltage. In other words, a bad connection somewhere. Also, based on this similar problem, it might still be a coil.

Edit: Forgot to ask, how did you get the damn plugs out? Oh, and what brand did you replace them with?