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Old 10-17-2010, 05:06 PM
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3.6L acceleration hesitation and shudder problem

My 3.6 GC Limited was built July 7. There was a TSB to flash the PCM in , I believe, August. Some shudder, stutter problems continued. The following was performed last week and appears to have smoothed everything out. That includes hesitation on launch and some shifting roughness in Auto mode. Check TSBs at wk2jeeps.com



18-026-10
GROUP: Vehicle Performance
DATE: September 25, 2010
SUBJECT:
Flash: MIL Illumination, Sag/Hesitation At Launch
OVERVIEW:
This bulletin involves flash reprogramming the Powertrain Control Module (PCM) with new
software.
MODELS:
2011 (WK) Grand Cherokee
NOTE: This Service Bulletin applies to vehicles equipped with a 3.6L engine (Sales
Code ERB) built before August 17, 2010 (MDH 0817XX).
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Old 10-17-2010, 06:04 PM
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Re: 3.6L acceleration hesitation and shudder problem

I have the 5.7L and now noticing that at highway speeds the engine doesn't feel smooth as if it's missing (very mild). Even my passenger noticed the unsmoothness.
Is this similar to what you had?
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  #3  
Old 10-17-2010, 06:27 PM
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Re: 3.6L acceleration hesitation and shudder problem

Thanks for the update Abby. Mine is going in for the exact same problem with hesitation and possible shudder. I will make sure to mention this to the dealer
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Old 10-17-2010, 08:34 PM
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Re: 3.6L acceleration hesitation and shudder problem

there is a thread covering this that I have merged like 3 others too. So please try to keep it to that thread so all 2011 owners can have one consise thread to go to.
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Old 10-17-2010, 08:35 PM
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Re: 3.6L acceleration hesitation and shudder problem

here is a link...

http://jeepgarage.org/showthread.php?t=12530
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