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Unread 07-06-2014, 10:17 AM   #1
thelms
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2009 WK 
 
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Location: lebanon, mo
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Wk Sputtering... Help

Hi there everyone. I am new to the forum and I have a question.


I have a 2009 Grand Cherokee. It has recently started sputting when driving. It seems to do it when I have the gas pedal barely pushed in. When I accelerate it does just fine and no sputter. I haven't noticed it sputting when I am stopped either. It's not all the time and no lights have came on. Also the check engine light isn't on.


It has 83k miles on it. It also has the 3.7 v6. I recently replaced the air filter and it does seem like it has helped.


I have heard from a few local people that it could be anything from fuel filter, fuel pump, fuel injector, spark plugs, spark plug wires or o2 sensor.


I could really use some help. Thanks.

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Unread 07-06-2014, 11:19 AM   #2
tom19511
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Try spark plugs first. They should be changed every 30000 miles.
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Unread 07-06-2014, 11:28 AM   #3
thelms
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Location: lebanon, mo
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What would be the best spark plugs? Should I stick with NGK copper? Or go with others? Also is it fairly east to do in a WK? I have done it in a wrangler and my cars, but not a WK.
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Unread 07-06-2014, 01:15 PM   #4
modernblueWK
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Get the stock replacement plugs. They go in from the top under each coil. Held down by the coil packs which are held down with 10mm nuts. I unplug each coil. A little dielectric grease in the connector, inside the boot and some anti sieze on the plug threads.
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Unread 07-06-2014, 01:19 PM   #5
thelms
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Thanks tom19511 and modernbluewk for the information. I am going to pick up the NGK 6987 spark plugs after work today. I hope to have them installed in the next few days. I just hope this is it and nothing else.
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Unread 07-07-2014, 08:43 AM   #6
tom19511
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Great, Please let us know how you made out.
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Unread 07-13-2014, 11:02 AM   #7
thelms
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I am finally able to do the install tomorrow. But I have noticed something strange. I only have 3 coil packs on the drivers side. I was told that there should be 6 coil packs. Has anyone else experienced this?
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Unread 07-13-2014, 12:25 PM   #8
modernblueWK
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3 on each side. V6
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Unread 07-13-2014, 03:05 PM   #9
thelms
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I have looked under the hood and I don't seem them on the passenger side. I have heard of other 2009 WK with the 3.7 only having 3 on the driver side. Looks like a wire is running to the other side of the motor to where the other spark plugs would be.
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Unread 07-13-2014, 03:07 PM   #10
thelms
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also my coil packs on the driver side is held down by a bolt and not the nut like others have posted.
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Unread 07-13-2014, 04:54 PM   #11
modernblueWK
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Well 3 coils or 6 your spark plugs are in the same place. Straight down into the heads. So look for spark plug wires in this area.
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Unread 07-13-2014, 04:57 PM   #12
modernblueWK
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http://www.jeepforum.com/forum/f67/2...p-how-1346787/

Heres my writeup for the 4.7 v8.
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