4.0 #5 cylinder misfire - JeepForum.com

 
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post #1 of 3 Old 07-27-2009, 01:53 PM Thread Starter
mrh45
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2001 XJ Cherokee 
 
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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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post #2 of 3 Old 07-27-2009, 02:09 PM
ezflip
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Is it just throwing the code or is it doing anything mechanically?

~James

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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post #3 of 3 Old 07-29-2009, 04:01 PM
20jeepwj00
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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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