Question about 2004 Jeep Grand Cherokee

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I have a misfire on number 3 cylinder. I replaced the coil and spark plug but I still have the same problem

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 315 Answers

SOURCE: 1996 Jeep GC - Diagnostic tool identified cylinder misfire

P0300 Code - Random Misfire

Symptoms Symptoms may include:

  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes A code P0300 may mean that one or more of the following has happened:
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

Posted on Mar 05, 2009

  • 6 Answers

SOURCE: #3 cylinder miss firing--2001 jeep g.c. larado

check from the spark plug back...

Posted on Mar 17, 2009

yankstorm02
  • 145 Answers

SOURCE: We have replaced the coil pack 3 times and the pcm once and about every 6 months we get a code for misfire on cylinder # 1 and winds down to replacing the coil pack every 6 months. Have seen this befo

the ignition module may be going bad Are you using oem coils

Posted on May 21, 2009

  • 21 Answers

SOURCE: MISFIRE CYLINDER #3 CHECK ENGINE LIGHT COMES ON VEHICLE

Check spark plug wires for corrosion

Posted on Aug 27, 2009

  • 2926 Answers

SOURCE: cylinder number 5 misfire, what

I'm assuming the code that was pulled is P0305. Best case would be a bad spark plug on the number 5 cylinder. Keep in mind, the spark plugs are torque sensitive when installing. These are the possible causes that are stated in a Jeep service manual for your vehicle. Check the basics first......Camshaft,crankshaft,valve timing or vacuum problem,ignition coil output is low,engine internal mechanical problem,secondary ignition pattern is irregular, fuel contamination, Fuel pressure leak down is out of spec, fuel pump ampere out of spec, fuel pump capacity out of spec, fuel pressure is out of spec., engine compression, PVC system restriction, Fuel injector #5 is defective or the connection on the injector itself is loose or corroded, Intake gasket defective. It could also be freeze frame data in the PCM, but this is a very very rare cause.

Posted on Mar 15, 2011

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1 Answer

Causes cylinder misfire


Most common cause is an old spark plug that burnt out the coil. Spark plugs should be replaced every 100,000 miles. If the plugs are old replace the spark plugs and swap the coil with cylinder 6. If the code jumps to cylinder 6 you know you have a bad coil.

Apr 03, 2014 | 2002 BMW X5

1 Answer

Misfire in number 3 and number 4 cylinders


Misfire is not always from coil. It could be from spark pug wire and injector.
Solution:
-Test the injector at the misfire cylinder. Is it within specification...?
No.>>> The injector is bad. Replace new one.
Yes. the injectors are good and within its specification.
-Check the plug wire. it might be broken and spark to ground or too much resistant. If so replace it.

Mai Lor

Feb 24, 2013 | 2005 Ford Taurus

1 Answer

Number 3 and 4 are not firing from coil on 2002 subaru outback 2.5


its faulty coil.

Get the compression test done on each coil.these will let you know if its faulty coil or not.

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It can be issue with spark plugs or faulty spark plugs. Also get the compression test done for cylinders. If any of cylinder shows low compression then required, then that particular cylinder will cause misfire.

Also get obd codes scanned, the error code will let you know which cylinder is misfiring or all cylinders are misfiring.

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For your trouble shooting I suggest you to refer the help oinks below. It has step by step details for many engine misfire issues.

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Click the link below:-----


Ford Explorer Cylinder Misfire?

http://whoisbyme.blogspot.in/2012/06/ford-explorer-cylinder-misfire.html

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Engine Misfire codes on Chevrolet Malibu?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

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Cylinder 6 Misfire?

http://howtobyme.blogspot.com/2011/12/cylinder-6-misfire.html

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Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Ford Explorer 5.0L: Engine Miss?

http://whoisbyme.blogspot.in/2012/06/ford-explorer-50l-engine-miss.html

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Oil on spark plugs and car misfires?

http://technoanswers.blogspot.in/2012/02/oil-on-spark-plugs-and-car-misfires.html

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Can cylinder misfire Damage the Catalytic converter?

http://schematicsdiagram.blogspot.in/2012/02/can-cylinder-misfire-damage-catalytic.html

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Car misfires and error code P0306 and P0303 is shown?

http://technoanswers.blogspot.com/2012/01/car-misfires-and-error-code-p0306-and.html

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Chevrolet K1500 No spark, random misfire

http://repairhelpcenter.blogspot.com/2012/11/chevrolet-k1500-no-sparkrandom-misfire.html

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2004 Ford F150: Engine Misfire and Lean Code?

http://whatisbyme.blogspot.in/2012/05/2004-ford-f150-engine-misfire-and-lean.html

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1995 Toyota LS: Misfire at idle or low RPM

http://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html

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Toyota Corolla: Random Misfire?

http://technoanswers.blogspot.in/2012/04/toyota-corolla-random-misfire.html

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2006 Ford Freestar: Misfire on Cylinder Number 2?

http://whatisbyme.blogspot.in/2012/06/2006-ford-freestar-misfire-on-cylinder.html

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This will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

3 Answers

I have a 97 Ford Explorer AWD 8 cylinder. Check engine light comes on and I get code p303. Vehicle bucks at times, uses lots of gas. Believe it may be 02 censor, spark plugs and wires tested ok. Any Idea


code says #3 cylinder misfire, check the coil pack for this cylinder to see if its got spark, bad o2 sensor will spit another code, its most likely the coil

Mar 17, 2011 | 1997 Ford Explorer AWD

2 Answers

Kinda putters then engine light came on and its giving me a code p0303


p0303 is a mutible engine misfire on number 3 cylinder. the best fix,

A code P0303 may mean that one or more of the following has happened:

  • 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
  • Poor compression
  • but first of all check the wires and sparkplugs first!

Feb 18, 2011 | 2001 Jeep Grand Cherokee

2 Answers

Cylender number 1 misfire,


Do a complete tune up.. Spark plugs, wires, distributor cap, and rotor button... If it has coil packs that sit on top of the spark plugs.. Replace the spark plugs and cylinder number one coil

Feb 15, 2011 | 1998 Nissan 200SX

2 Answers

I have a code misfire cylinder 5 and I am not sure where cylinder 5 is on my engine and it runs like **** and when i give it gas Service engine soon light comes on. specs: 2000 v8 8.1 litre gas Vortec 8100...


Cylinder numbering for your engine is 1-3-5-7 on the left hand bank and 2-4-6-8 on the right hand bank (passenger side). To be sure where number 1 is look across the cylinder heads number 1 cylinder is always the head that is furthest ahead towards the front of the vehiclek, then count 3 cylinders back on that side, should be left, and that should be number 5. pull the spark plug first and check it and at the same time pull number 3 's plug and swap the coils from 5 to 3. If the plugs are bad replace them all. Then run the vehicle and see if the misfire code followed the coil to number 3, if it does you know you have a bad coil, they usually run about 90 - 100 bucks each, that is if the plugs or wire wasn't the problem. hope this will help you. good luck.

Apr 08, 2010 | 2000 Chevrolet 3500

2 Answers

1999 town car whats the number 3 misfire


a misfire on cylinder number 3. could be a dodgy spark plug, HT lead or coil pack/ distributor hope this helps

Dec 02, 2009 | 1999 Lincoln Town Car

3 Answers

2001 ford taurus error code p0303


That is a cylinder misfire code have you had the plugs changed, could be a bad plug maybe bad coil, or injector how does it run

Jul 01, 2009 | 1999 Ford Taurus

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