Question about 2001 Ford Focus

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Misfire cylinder I have the same problem on my 2001 ford focus misfire cylinder 4 I change plugs, engine light appered same problem. I push plugs in and is o.k runs 10 to 15 miles and same light appears is anoying... I will double check if blug is brown in color or beigh that works for some people. I try everything what next...Help any suggestions...

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  • Ford Master
  • 5,678 Answers

Change the coils.

Posted on Apr 25, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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StormStrikes
  • 104 Answers

SOURCE: engine misfires

You didnt mention having changed the spark plug wires, so that is another item that could be culprit as well. As well, it could be a coil pack that is not working properly.

I cannot recall at the moment if that model year uses coil on plugs or if it uses coil packs. Either way, if it uses a coil on plug set up, take the one for the #3 cylinder and move it to say #4 or anyone of your choice and see if the misfire follows

If it uses coil packs, there is likely one coil pack that controls two cylinders. In that case just swap the coil pack with an adjacent one and see if the problem follows. Pay attention to where the spark plug wires go because it will be an issue if you get them mixed up. You just swap the coil packs around.

I would, however, start with the spark plug wires if you have not changed them already.

Posted on Dec 31, 2008

chuck943
  • 783 Answers

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

  • 105 Answers

SOURCE: 2001 Ford Windstar runs rough.

remove the coil pack and look at bottom of it if it shows any cracks coil is bad very common on these vans if you have a noid light check for injector pulse on #4 if you have pulse and good blue spark most likely the injector is bad you have to remove upper plenum to get injectors out let me know how you make out

Posted on Jun 04, 2009

  • 80 Answers

SOURCE: 2002 Ford Ranger check engine light indicating misfire

Code P0301
Ignition Coil Pack
Ignition Cable
Spark plug
Clog or dirty fuel injector
Evap canister purge valve
Engine Compression
fuel pressure

you have 3 type of engine for your truck
2.3L 4 cylinder
3.0L 6 Cylinder
4.0L 6 Cylinder

need to know that type Engine

The reason why the service light come on because it is a hard code
not a soft code.

Let me know

Posted on Sep 20, 2009

  • 76 Answers

SOURCE: Misfire on a ford focus

yes if 1 and 4 are on the same coil pack, thats the place to start and i think thats your answer

Posted on Oct 03, 2009

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1 Answer

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Can you confirm cylinder two is getting spark ?
If it is, it could be something mechanical or the fuel injector.

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Engine light came on, had a p304 code. Took car for repair, mechanic could not figure out why engine light came on. Cleared light, car started to hesitate when stopped, engine light came back on. Spark...


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it got to do with the coil is bad in the for focus i had the same problem with my for focus it is a 4 not a 3 .

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I have code p0304 what does my 2001 ford focus need to fix?


Courtesy of obd-codes.com

Symptoms:
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Possible Causes:

  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
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1 Answer

Misfire on a ford focus


yes if 1 and 4 are on the same coil pack, thats the place to start and i think thats your answer

Oct 03, 2009 | 2001 Ford Focus

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Do a tune-up or clean your spark plugs.

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check you put the same rated plugs in as there are a few different types they are rated from a cold plug to a hot plug which basically means the run better at the set temp

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Try a compression test. You could have a bent valve or a bad ring on the piston. If the compression test shows it to be much lower than the other cylinders then its a mechanical problem. The valve may not be seating or a weak spring isn't allowing the valves to close and its leaking under load.

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