Question about Jeep Liberty

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2002 Jeep Liberty Sport 3.7L V6 Replaced all six spark plugs with brand new ones and replaced coils for 4 and 6 with new ones Still reading misfire Within 10 minutes of starting enging, vehicle idles very rough and engine light starts blinking Any ideas as to what may be causing the misfire?

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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.

Posted on Aug 30, 2010

  • Richard Brooks Feb 19, 2011

    I have same jeep and same problem......my MAC TOOLS scanner says that ignition coils
    A,B,and E PRIMARY/SECONDARY ARE BAD.....I changed all of them and new oem plugs
    but it still will set the same code....runs,idles very rough,very bad unless i remove the pcv
    hose from intake....it will stay running with hose removed but still very rough...bad.......
    ...clueless

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Rocker arms fall off. Mine has done it twice. Causes you to look everywhere else. That's what it is though.

Posted on Mar 01, 2013

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1 Answer

2011 jeep liberty spark plug wire diagram


old post
no engine stated
one is 4 term coil pack
other is V6 with 3 coil packs. 3.7L
on my 3.7L it has 6 coil packs but some liberty have 3.

do tell or someone piggy back on this and we can do either
most jeeps have 2 to 4 engine options
so never post lacking engine there. tell it.

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How to replace clutch master cylinder 2002 jeep liberty


the fsm covers this. ever heard of the factory service manual.?
on my wranger the whole system is replaced as one.
slave, mc and the hoses are married.
alldata.com
log in and read.
or go to jeep and look.???? really its there to see at any moment
here it is.
ill pretend 5speed, V6, sport

as you can see , the part id is just #1
all in one.
see it?


http://www.factorychryslerparts.com/showAssembly.aspx?ukey_assembly=624293&ukey_make=1064&ukey_model=15531&modelYear=2002&ukey_category=20303&ukey_driveLine=7344&ukey_trimLevel=18760

now you can see any part any time ,
no more guessing
the procedures are in the FSM or at alldata.com
fully documented, and jeeps have the best docs. IMO

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1 Answer

02 Jeep 3.7L v-6 no spark,coils and crank sensor good.HELP.


Are the spark plugs and spark plug wires the original parts that came with the car? If yes, replace them.

Jun 05, 2014 | 2002 Jeep Liberty

1 Answer

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.

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try putting a new coil pack on it they go bad-Denny

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2002 jeep liberty 3.7 liter 6 cylinder 4x4 spark plug gapage. What should it be?


Make: JEEP
Model: LIBERTY - SPORT
Year: 2002
Engine: V6 - 3.7L - FI - - GAS

Part Number RC9MC4 .044" (Original Equipment Manufacturer and/or Original Equipment Equivalent)

Hope helps (remember to rated and comment this).

Sep 12, 2010 | 2002 Jeep Liberty

2 Answers

Oil light comes on at idle, goes off when driving, oil level full


change oil pressure switch it' should be near the oil filter

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