Question about 2005 Ford Freestar

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Engine misses and skips

May go days or weeks w/o a problem. Then starts cutting out, bucking, missing severely. After first incidents last fall, did major tune up--wires,plugs,etc. Since then plugs have been replaced again, coilpack has been changed, emission valves checked, injectors checked. Afterlast work on Jan 15, experience no problem until 2 days ago, Was pretty bad. Took it back to mechaic today (running fine). No solution.

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  • fishermom359 Feb 18, 2009

    My 2005 Freestar (4.2L) has the same missing/skipping problem, but oddly enough it only occurs when it is snowing (I live in MN so this is not good.) Has been in the shop 2x, they say it is fine.

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Take a good close look at the rubber strip between the windshield and the plastic shroud the wipers are mounted in. If it is not a tight seal on the passinger side water can run down and get the Pcm wet. When the Pcm gets just a little water on the connector it can cause the problems you describe. If it gets alot of water on it it can and fills the Pcm up, then you will have major problems. It will set error codes for everything and anything.
This is a defect in the design of the vans and the only way to fix it is to make sure that this rubber seal is tight against the glass (especially on the passinger side).
I had to have my Pcm replaced because of water (not a cheap fix) and the dealer did what Ford recommends. It filled with water again. After the third try I gave the dealer a piece of an inner tube from a wheel barrow tire and had them place it over the connector and seal it against the fire wall. Then I used aquarium sealant and glued the little rubber strip to the windshield.
I haven't had any more problems since.
The Pcm connector is probable the most critical part of the electrical system and they placed it in the worst possible place.
Ford knows of the problem but will do nothing to fix it.
Mine cost over $800 to fix, but believe it or not my insurance paid for part of it because it was water damage.

Posted on Mar 06, 2009

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Check the crank shaft position sensor, it tells the timing and if it's bad it will be like it' s out of time and missfire or even stall

Posted on Feb 14, 2009

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