Question about 2006 Jeep Grand Cherokee

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Replaced #5 coil and all plugs on 06 jeep liberty vehilce still shows misfire on #5 cylinder after clearing all codes

Vehicle had other codes but all have been repaired

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  • 16 Answers

It sounds like it could be number 5 injector. I suggest you swap number 5 injector with one of the others and see if your misfire moves to this cylinder

Posted on Jan 05, 2013

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Posted on Jan 02, 2017

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SOURCE: I have 2004 Jeep Grand Cherokee special Edition

have you checked the IAC, idle air control,or cleaned the throttle body and plate.

Posted on Nov 25, 2009

BCAS1298
  • 3092 Answers

SOURCE: 2002 Jeep Liberty Sport 3.7L

We have an 02 Liberty 3.7L, here at my repair shop, after customer replaced, spark plug's and all coil pack's, brought it here to my shop, was running with two cylinder's miss, did cylinder compression test, no compression on two cylinder's, remove valve cover's, found two rocker arm's off, remove cylinder head's, and found that on those two cylinder's the valve seat's had drop, keeping the valve open, and that's why the two rocker arm's had come off, do a cylinder compression test, could be the same thing, hope this was very helpful.

Posted on Aug 30, 2010

SOURCE: 2002 liberty 3.7 liter. I have replaced the coil,

If you have Coil- on -Plug you haven't found the bad one yet

Your not always going to get a code that is correct
e.g.PO304,PO305 etc

I would buy the injector from you, as I'm sure that wasn't it,
unless you have an air leak around it

You want no vacuum leaks,a near new EGR Valve,no
air induction tubing leaks

Clean the MAF Sensor with CRC MAF Cleaner

Clean Throttle Plate--CRC Throttle Body Cleaner

You did put anti-sieze on those spark plugs, if not
do so.

How old are the O2 Sensors
More than 80,000 mile,replace the front 2 with OEM
Specific Make--Bosch or NGK etc and not some
cut & splice universal type

Posted on Feb 01, 2011

ZJLimited
  • 17970 Answers

SOURCE: 2005 jeep liberty engine misfire cylinder 5

A code P0305 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
Defective computer


If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. 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. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Posted on Dec 07, 2011

teescribo800
  • 1 Answer

SOURCE: 2002 Jeep Liberty 3.7 with a Cylinder 2 misfire.

check the fuel injector in most cases when the number 1 injector goes bad the other injector have the tendency to misfire. Also you need to check the fuel pressure to see if is to low due to a dirty filter.

Posted on Apr 25, 2012

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How do i replace the wire harness connector that clips to coils on jeep liberty sport 6v 3.7l


It's pretty basic on this. Test your clip by plugging it into the coil first, and make sure that it is the correct one. If yes, you need to simply cut the old plug off and connect the wires to your new one (in the right order) with a simple but connector sold at any auto shop/parts store or electrical shop.

Jan 08, 2014 | Jeep Liberty Cars & Trucks

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What is a misfire and would that stop the vehilce from shaking?


usually a miss fire is cause by a bad coil or wire if u have the single coils in each cylinder if u code read it it will tell u which one is bad ....if coil pack then could be it needs a new set of wires and yes it would run shaky cause instead of running on 6 or 4 its running on 5 or 3 which throws off balance o rotation just light an uneven load in the washer

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1 Answer

Continuous flash of the check engine light on a 2002 Jeep Liberty Limited what could be wrong ?


spark plugs can cause misfires for sure. If you swap the number two cylinder plug with another cylinder then retest the code and the code stays on the same cylinder then its not the plug. could be coil, injector, engine mechanical. be careful not to drive to long because you could damage the catalytic convertor. thats why the check engine lamp flashes because its a catalyst damaging misfire.

Jul 15, 2012 | Jeep Cars & Trucks

1 Answer

2005 jeep liberty engine misfire cylinder 5


A code P0305 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
Defective computer


If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. 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. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Nov 20, 2011 | 2005 Jeep Liberty

1 Answer

The code I have is P0306 Cylinder 6 misfire detected and I want to try to locate which cylinder is the sixth cylinder to troubleshoot. This is on a 2004 Jeep Liberty 3.7L


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2 Answers

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We have an 02 Liberty 3.7L, here at my repair shop, after customer replaced, spark plug's and all coil pack's, brought it here to my shop, was running with two cylinder's miss, did cylinder compression test, no compression on two cylinder's, remove valve cover's, found two rocker arm's off, remove cylinder head's, and found that on those two cylinder's the valve seat's had drop, keeping the valve open, and that's why the two rocker arm's had come off, do a cylinder compression test, could be the same thing, hope this was very helpful.

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