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.
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.
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Re: 2005 Ford Freestar-engine skips and misses
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
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A flashing engine light usually indicates a misfire or several misfires. If the ignition components (coils, wires, distributors...) some how become exposed to moisture it is possible to get a rough running engine due to misfire(s) cause by arcking.
Replace your cam positioning syncronizer head same problem squealing was coming from around alternator water pump area which is exactly where the cam positioning sensor is located not hard to do I did mine in a garage and it took about four hours
i would check the fuel filter if thats not it then it will most likely be the fuel pressure regulator make sure the vacuum line didnt fall off of it if that checks out then id say its your pump good luck i hope this helps
Both Autozone and Oreillys will scan your van without charge. A blinking light usually means an intermittent problem and may be picked up on a scanner this time. The local shop did right by checking the wires and plugs.
What they did was to check the spark side of the problem. You may have a problem with a fuel injector or its wire which also causes a miss. Nothing is easy to work on anymore. If this is your only vehicle it makes it hard to do something.
If the next scan does not help you about all you can do is catch it missing, shut it off, and pull the plugs. You can tell if a plug is not firing by looking at it. Or you can mist the engine with a water spray bottle , keep it dark, and start the engine and look for sparks jumping.
if you have a bad spark plug wire, it will draw condensation and make engine run rough.... you can check this by getting a spray bottle and filling it with water, spray a mist over top of the wires while the car is running, and if one is bad it will show.... (looks like little lightning coming off of wire) .... hope this helps
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.
A late reply; I'm sure you have found the problem by now-
It sounds as if the battery (old and new) are not receiving sufficient charge.
Check the drive belt tension and add a cheap digital multimeter to your 'tools.'
These can be had for well under $20 US and you can then check across the battery terminals to see if the charge voltage is between ~ 13-14.3 volts at an idle.
In no case should it be lower than 13 volts with the engine running since the nominal battery voltage is 12.6 volts when fully charged.
You may have a separate regulator that is ill.