misfire on #2 cyl. sometime run smooth then skips on 2008 Ford Explorer

i have changed coil pack, plugs, plug wires, is not losing water no bubbles in radiator....

by in Cadwell, GA on November 30, 2012
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2 answers 2 comments
ANSWER by , November 30, 2012
could have a vacuum leak check compression
COMMENT by , November 30, 2012
Agree with Goodguy, also may have an injector problem.
COMMENT by , December 01, 2012
good call wetry never thought about that
ANSWER by , December 01, 2012
Going along with goodguy and that guy wetry, if plugs are OEM , and it's SPECIFICALLY a #2 misfire only , then if plug is not misfiring due to oil fouling , you maybe could try swapping injector to a different cylinder to confirm that it's the injector , not an internal problem? wetry might call me an idiot , but thats only because I like green jelly....................Don't underestimate the power of a plug to give you good info. on the problems cause!