4.0 #5 cylinder misfire - JeepForum.com
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Unread 07-27-2009, 02:53 PM   #1
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2001 XJ Cherokee 
Join Date: Jul 2009
Location: blowing rock,nc
Posts: 1
4.0 #5 cylinder misfire

My 2001 grand cherokee misses on #5 cyl throughout rpm range. I changed plugs, coil pack and cam position sensor. Still misses.
It makes a ticking noise and I'm wondering if I have a broken valve spring.

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Unread 07-27-2009, 03:09 PM   #2
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2002 WJ 
Join Date: Oct 2008
Location: Michigan
Posts: 5,673
Is it just throwing the code or is it doing anything mechanically?

2002 Overland - 4.7 HO, "Select-Drive", 4" RC long arms, TAG front winch bumper, 32" BFG KM's, 3" exhaust, Magnaflow hi-flow cat, Flowmaster 50 series

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Unread 07-29-2009, 05:01 PM   #3
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2000 WJ 
Join Date: Oct 2008
Location: east haven ct
Posts: 44
many times i have seen the #5 or 6 cam lobes wear causing misfires and lifter noise.if the fuel and ignition system check ok it may be the cam .you can also do a leakdown test and rule out any other valvetrain or ring issues.
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