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2005 Ford Freestar-engine skips and misses

The problem started last fall. It is serious, sometimes wonder if it will stop running.May go for weeks w/o a problem and then fix itself again. So far--new wires,plugs(twice),coil pack, injector check, emission valve checks. I got it fom the garage around Jan 15 and no problem until Feb11. We are all stumped.

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Check to see if the PCM or it's connector is getting wet. Where Ford located the PCM on the Freestar Vans it was the worst posible place to put them. Ford knows of the problem with them getting wet but will not fix them. If the rubber gasket on the passinger side is not sealed tight to the windsheild then watter can run down off of the windsheild and into the PCM. Once this gets wet it will cause all kinds of problems until it dries out again. Then it will run fine until you wash it or it rains or snows. Check that rubber seal first then you can look at Fords TSB concerning the problem and how to fix it. (didn't work real well on mine) Then get some aquarium sealent and glue that little rubber strip to the glass (this fixed mine). Of coarse Ford charged me $800 for their fix.

Posted on Jun 08, 2009

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I would have the timing and the timing belt check and i would check all of the vaccum lines to make sure all of them are on and the one behind the throttle body as well if the car has over 60,000 miles it also need a tuneup and a new drive belt as while

Posted on Feb 14, 2009

  • toolguytim Nov 14, 2010

    this vehicle does not have a timing belt, it's ohv. cam is chain drive. checking for vacuum lines and loose plugs is always a good idea for odd running problems.



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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.
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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.

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