Question about 2005 Ford Freestar

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My 2005, Ford freestar 3.9l engine, has. Been hesitating when trying to eccelerate going up hill. The codes I'm getting : B1235 -no etc Dec found. U1009- Standard communication protocol invalid missing for engine torque. U1027- missing data for Eng rpm. P0303- cylinder #3 misfire. I was told it maybe the computer? Any thoughts?

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Posted on Jan 02, 2017

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SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

Posted on Feb 05, 2009

  • 38 Answers

SOURCE: error code p0303 cylinder 3

A P0303 code – The #3 cylinder is in question. The computer has noticed that one of the cylinders is firing improperly.

Symptoms may include:

  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Poss. Causes:
A code P0303 may mean that one or more of the following has occurred:
  1. Faulty spark plug or wire
  2. Faulty coil (pack)
  3. Faulty oxygen sensor(s)
  4. Faulty fuel injector
  5. Burned exhaust valve
  6. Faulty catalytic converter(s)
  7. Running out of fuel
  8. Poor compression
  9. Defective computer
Poss. Solution(s):
If you are not having any of the above problems, then I would recommend resetting the code and see if it comes back.
If you experience / notice the engine is stumbling or hesitating, check the condition of the Spark Plug wires and boots. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. Another possibility could be faulty fuel injectors..

Good luck. I hope this helps.

Posted on Apr 07, 2009

  • 1 Answer

SOURCE: 1999 ford windstar 3.8 eng miss

remove the plenum take out injectors have them rebuilt change your plugs should clearup problem.  
ps if you have blowby problem could come back in a few months of driving.

Posted on Jun 01, 2009

  • 432 Answers

SOURCE: p0303 cylinder three misfire

Running out of gas causes the scum in the bottom of your gas tank to be fed to you engine. I replace the fuel filter every 30000 miles.You might have allowed scum into one of you injectors. Try replaceing that spark plug first.Dont run out of gas.

Posted on Sep 02, 2009

  • 432 Answers

SOURCE: I have a 2004 Ford freestar that is coming up with

The coil is bad. Just buy a new coil pack and that will fix it.
A friend has the same van and it was doing the same thing.

Posted on Sep 23, 2009

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PCM's don't fail often & you don't diagnose
things with a quess

Would drying out a pcm be something you would have
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What is the it that happens?

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Also leave the EGR disconnected if your working on coil issues. Just note the MIL light will stay on all the time,and remember to check your 300 codes if you feel a hesitaton or miss.

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