Question about 2003 Ford Freestar

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My freestar Misfires between 40 and 70 mph. They have done a tune up and sealed around the computer due to water getting into it, but now it misfires more aggresively and frequently. Some knocking type noises. Has about 97,000 miles on it.

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The water getting into the computer would scare me. The PCM needs to be scanned with a good scanner. The readings should lead to the problem [ s ], it could be the computer is corroded internally.

Posted on May 19, 2011

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Posted on Jan 02, 2017

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Could be a coil breaking down , you did replace them did you ? Take a spray bottle of water an spray the coils , mite find cause of the misfire . Also look at coils for a discoloration , a rainbow affect . Or you can power brake the vehicle an take a test light an put neg . clamp end on battery neg . an then move the point end around the coils .

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My 2005 ford frestar is leaking water in the back hatch are and was wondering were it might be coming from


I had water coming into the rear storage area. Finally found where it the leak was. The plastic panel on which the license plate mounts was leaking around the panel allowing water to run down onto a little ledge area and the enter the rear storage well at the left rear corner of the storage well. I have tightened the nuts that hold the panel against the gasket and if that does not stop it, I will loosen it an put clear silicone seal around the pane. It was hard to figure out! I had to remove the rear trim to see where the leak was. Hope this might help.

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What is the PCM in the Ford Freestar and and what happens if water gets in or on it? Where is the PCM located? How much is the repair cost to fix this problem? How much does it cost to replace the PCM in...


The pcm is located Under the windshield wiper coil on the passenger side of the engine compartment, where water can collect.And yes if its get wet it can get short.The radio,the ac the lights and other electrical functions works intermittently .The cost of pcm is near to $1000.You can get it from autozone service center or from local auto part stores. ---------This will help.Thanks.Helpmech.

Dec 15, 2010 | 2005 Ford Freestar

1 Answer

02 altima 145,000 miles, original owner. serviced


If you get ck engine light on , you have a cyl. number
that misfires , ck vacuum leaks on intake manifold around that area aspecially intake manifold gasket.

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Oil around spark plug and car mis fires


The oil around the plug may be a sign that the valve-cover needs a new gasket. Oil on the plugs can cause a misfire but it is important that you check everything over. The misfire could be due to defective wires, boots, coils, spark-plug/s, injector/s, and so much more. Take a look at the cars maintenance history, Maybe it is over due for a complete tune-up or oil change. The car is 11years old, how many miles are on it? How was it running before this?

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I got code PO303 on my 2006 ford freestar i just want to know what i can expect it to cost to fix


A P0303 code is a cylinder #3 misfire code. Usally a tune up, of plugs and wires fixes the problem. Normal cost is about $5 dollars a spark plug, about $85 in spark plug wires and around $100 in labor. So around $200-250 for the tune up. Then you'll need them to clear the check engine light, which may cost a diagnostic fee. If you haven't done a tune up in a while that would be the place to start. The other problem it could be is a fuel injector or a cylinder compression problem but those are unlikely. Hope this helps.

Mar 01, 2010 | 2006 Ford Freestar

1 Answer

Wheres the computer located?


The PCM is located on the passinger side. It is mounted in the firewall and to get access to it you have to remove the plastic shroud that the windshield wipers are mounted in. It has to be removed from under the hood even though most of the PCM sits inside under the dash.
Once you remove the plastic shroud be careful that when you reinstall it that the rubber seal against the windshield is sealed or when it rains the PCM will fill with water. This happened on my 2005 freestar after the windshield had been replaced. Ford has put out a TSB on this problem but they won't stand behind any repairs. I sealed the plastic shroud with silicon sealant. I glued the rubber seal right to the glass, Have not had any more problems since.

Aug 22, 2008 | 2005 Ford Freestar

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