Question about 2003 Ford Ranger Regular Cab

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Why does my 2003 ford ranger miss fire on cyl #3 plug and wire check to be good

Changed coil pack # 3 still misfires

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Week injector

Posted on Jul 18, 2014

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6 Suggested Answers

6ya6ya

6ya staff

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Posted on Jan 02, 2017

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chuck943

Chuck Martin

  • 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

fingaz22

michael schultz

  • 1068 Answers

SOURCE: 2004 ford ranger edge has blinking check engine

have the crank sensor check for erratic operation. if you have done all of that then there is nothing else. and they way the computer knows it is misfiring (if it is) false code maybe and could be bad crank sensor. good luck

Posted on Oct 25, 2009

Anonymous

  • 3 Answers

SOURCE: 2002 Ford Taurus 3.0 engine misfire at 1000 R.P.M.

Have you checked your camshaft sensor? It's possible that the vane on the Synchronizer is misaligned.

Posted on Feb 19, 2010

alicantecoli

Colin Stickland

  • 22485 Answers

SOURCE: 2001 ford windstar-new coil pack,new spark plugs

head gasket?? blowing between two cylinders

Posted on Mar 19, 2010

wolf_charmer

wolf_charmer

  • 1 Answer

SOURCE: 2001 ford taurus p0301 and p0303

Hi, i got a 97 ford taurus lx 6 cyl. anyways, i got a flashing engine light n i have misfires in cylinders 2, 3 n 4 n it is running rich. i get many codes. im getting ready to take a long trip n move to michigan so im trying to figure out the problem with my car. we have replaced the injectors,plugs ,wires,fuel filter, going to try to change the coil pk n put new mufflers on it. can anyone help me with this issue on my car. im a disabled lady needing help..thank u....

Posted on Apr 06, 2012

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1 Answer

P0303 cylinder 3 misfire


If # 3 cylinder has spark at the plug it must fire if the following conditions apply. Injector is supplying fuel to the cylinder. and cylinder compression tests OK . So check above ,one or both must be at fault.

Jul 17, 2014 | 2003 Ford Ranger Regular Cab

1 Answer

# cylinder 3 misfire


you don`t say how you verified that the plug and wire was good. I think these use coil on plug, if so check powers and grounds for that coil as one may have a problem.other things that could cause this is a bad fuel injector, poor compression due to either rings, valve, worn cam, damaged push rod,

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Misfire on number 2 cyl


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2001 ford taurus p0301 and p0303


You are mis fireing on cyl 1 and 3 if you replaced plugs and wires and coil this is going to be a fuel injector issue or valve issue. See if you can swap the injectors with known good cyl. and see if it changes. Or have a shop do a fuel injector service on it to see if it helps. It may be to late for the fuel injector service.

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