chugging, tappet, spuddering sound - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 19 (permalink) Old 06-26-2007, 06:49 PM Thread Starter
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chugging, tappet, spuddering sound

Hello to all, New here.
Wife just got a 2007 commander Limited 5.7
She loves the car, but when we accelerate slowly and hold speed between 20-35mph it the car sounds like an old POS. There is a Chugging, spuddering, tappet sound. There is no feeling of chugging or missing. In fact during the acceleration or constant low speed, if you take the car out of drive and put it in neutral the sound is gone......anyone else have this....The deal said that is the way it is......for $48K sticker it should sound much better.....any input please Thank.....
Plus has anyone put on a MagnaFlow exhaust....input

Martin
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post #2 of 19 (permalink) Old 06-26-2007, 07:32 PM
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Join Date: Jan 2007
Location: Temecula, California
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Model year: 2006
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Power-Train: 5.7L V-8 Hemi
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Re: chugging, tappet, spuddering sound

I have the same sound, the dealer says that is the way it is. It is most noticeable under light, low speed acceleration. especially if there is a wall or building next to you that echoes it back. At first I thought it was a leaking exhaust manifold gasket. Yeah, it really sounds crappy.
Any other 5.7 owners notice this, or is the dealer BS'-ing me? (I have not driven any other Hemi Jeeps to compare)

Martin -Put the magnaflow and an intake kit on - it will sound a lot better and give better throttle response. Won't fix that tappet sound, though.
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post #3 of 19 (permalink) Old 06-26-2007, 07:34 PM
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Join Date: Jan 2007
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Re: chugging, tappet, spuddering sound

Oh, and welcome to the forum!! you will find tons of useful info and nice people here
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post #4 of 19 (permalink) Old 06-26-2007, 08:55 PM
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Re: chugging, tappet, spuddering sound

I have the same issue on my 3.7. I sound like [email protected] under look acceleration.
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post #5 of 19 (permalink) Old 06-26-2007, 08:56 PM Thread Starter
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Re: chugging, tappet, spuddering sound

Thank,
That is the exact sound I am talking about.
There is not tappet sound from the engine , it only sounds like that.....

Does any have the magnaflow cat back exhaust....I found a great deal.....
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post #6 of 19 (permalink) Old 06-26-2007, 09:01 PM
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Re: chugging, tappet, spuddering sound

Im looking to see what modifications there are for the 3.7?
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post #7 of 19 (permalink) Old 06-26-2007, 10:36 PM
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Re: chugging, tappet, spuddering sound

I have the 06 5.7L and not noticed it, but I have not tried it close to a wall where I could get better feedback. Maybe I accelerate too fast. I'll check it out this weekend.
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post #8 of 19 (permalink) Old 06-26-2007, 10:38 PM
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Re: chugging, tappet, spuddering sound

Wait you have a HEMI and you have managed to find a way to accelerate slowly? Whenever I try to do that, my foot takes control away from my brain and mashes to the floor. :-)
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post #9 of 19 (permalink) Old 06-27-2007, 07:32 AM
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Re: chugging, tappet, spuddering sound

I wonder if the transmission is upshifting too fast under those conditions. Why not try manually shifting by tapping the shifter to the left through each gear and see if it makes the same noise under the same conditions. john
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post #10 of 19 (permalink) Old 06-27-2007, 07:57 AM
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Re: chugging, tappet, spuddering sound

No issues with my HEMI with the acceleration except gas loss..
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