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-   -   GC 5,7 HEMI engine knock sound problem !!! (http://www.jeepgarage.org/f5/gc-5-7-hemi-engine-knock-sound-problem-14225.html)

kuja 10-21-2010 01:03 PM

GC 5,7 HEMI engine knock sound problem !!!
 
HI guys ,,

It's my first time posting a thread , and hope finding some solutions. :D

OK , I have a 2009 grand cherokee overland 5,7 HEMI engine
Made in Austria( WH export model since I'm in Saudi Aribia ). :cool:

The problem is when starting the car after been cooled down (about 3 hours) and start moving, A KNOCK SOUND APPEAR RIGHT WHEN SHIFTING FROM 1st TO 2nd GEAR !!
I went to the dealer ( under waranty ) and they say they are not catching the sound or source of it. :mad:
I forgot to mention no error codes appear.

Don't know if my ENGLISH is clear for you :confused:

Marlin 10-21-2010 05:36 PM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
I understand you mate.

Do you also feel a knock or are you just hearing it?

Is the shift harder than it should be?

Does it do this all the time?

GR33N D3M0N 10-21-2010 06:42 PM

Salam, good luck with the problem! Sorry I am of no help

kuja 10-21-2010 10:45 PM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
Quote:

Originally Posted by Marlin (Post 288584)
I understand you mate.
Good to know.

Do you also feel a knock or are you just hearing it?
Sometimes I can barely feel it under my feet that's when the sound is stronger than ever.

Is the shift harder than it should be?
No , I think the shifting procedure is OK.

Does it do this all the time?
Not all the time , but almost.


Thanks & I appreciate your interest.

kuja 10-21-2010 10:48 PM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
Quote:

Originally Posted by GR33N D3M0N (Post 288618)
Salam, good luck with the problem! Sorry I am of no help

Salam , and thanks for your reply.

Marlin 10-21-2010 10:51 PM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
My gut tells me you just need the PCM reflashed, or even just re-set.

There is a how-to on here somewhere on how to reset it yourself. Just do a search mate.

kuja 10-21-2010 11:39 PM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
Quote:

Originally Posted by Marlin (Post 288735)
My gut tells me you just need the PCM reflashed, or even just re-set.

There is a how-to on here somewhere on how to reset it yourself. Just do a search mate.


I assume you mean by PCM is the computer of the car , if it's that , the dealer did reflash it but it's no use.

anyway , again I appreciate your help mate
:)

Marlin 10-22-2010 12:15 AM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
The Powertrain Control Module.....

If you can, disconnect the battery overnight and see how that goes. It "wipes" the memory of the computer.

kuja 10-23-2010 09:35 PM

Re: GC 5,7 HEMI engine knock sound problem !!!
 
Thank you Marlin , I'll try it.


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