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Old 02-25-2013, 12:20 PM
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Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

I have a dead spot in the acceleration of my Jeep Grand Cherokee Limited with the 3.6L VVT engine. It is quite annoying. I just got out of a 3.7L SOHC Jeep Grand Cherokee that was much more responsive in traffic. I have taken it to the dealership a couple of time and they can't seem to find anything wrong with it. This dead spot is going to get me killed in rush hour traffic. I contacted Jeep Customer Server and entered a CAIR. The don't seem to be to concerned about it. I am an ex Chrysler Factory Rep and I know when I am being BS'd. Has any one else run across this problem?
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Old 02-25-2013, 12:36 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Perhaps it is the drive by wire or ETC lag? The Hemi sufferes from the same, whereby the vehicle learns your milder daily driving patterns, so it may result in a lag from pedal to throttle response. While this can be reset by the owner (see below post), the annoyance will return over time and use. The tuners are perhaps the best method to reduce the ETC lag, though I cannot speak to that yet.

Electronic Throttle Control (ETC) .. let's discuss
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Old 02-27-2013, 01:27 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Yeah -- the dead spot between 0-4000 rpms. The V6 is very poor on low end grunt. It's geared horribly. All the test reviews state it take a lot of revs to get it moving. It's adequate for me. But coming from my Ram with 3.92s, I do find myself often having to floor the Jeep to get it moving.
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Old 02-27-2013, 01:37 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Looks like another Chrysler stupid trade off move just to sell the vehicle rather that to do it right. Thanks, for your reply. I tried the resetting of the ETC (Electronic Throttle Control) steps above in this thread and it seems to have helped.
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Old 02-27-2013, 02:17 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Think their fix was to drop an 8 speed transmission in the 2014's. Field reports indicate that this makes the Jeep much more responsive.
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Old 03-01-2013, 08:35 AM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Pray for 8 speed gear. Gotta ditch that 5 speed one.
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Old 03-02-2013, 09:06 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Would it be possible to install one of these new 8speeds to a WK2 Grand Cherokee with the previous 5speed? Or housings and fittings vary too much to make the process reasonable?
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Old 03-04-2013, 04:38 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Anything is possible, but in the end, it probably would be just as cheap to trade yours in on a '14 -- with new warranty.
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Old 03-04-2013, 09:01 PM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

I too have this same dead spot at lower speeds, especially when trying to accelerate up a slight grade at approximetely 30 mph. When I attempt to give it just a little throttle to make it up the grade nothing happens, then by the time it does decide to react I have the accelerator pedal pushed so far down that it now causes it to kick down a gear and accelerate like crazy. Never in 50 years of driving different makes of cars have I ever encountered this type of problem.I have had it back to the dealership to reflash the engine and transmission computer modules. Still the same. Was loaned a Toyota on two different dealership repairs to this vehicle and I can tell you there was no hesitation what so ever with there vehicles. Any future purchase of a JGC by me will be dependant on this problem being rectified. I too am worried about an emergency situation where acceleration is needed that it would respond in time.
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Old 03-05-2013, 01:50 AM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Use the Autostick. I use it all the time.
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Old 05-09-2013, 02:17 AM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

I to feel forced to use the auto stick or to be in sport mode to get the responce
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Old 05-10-2013, 07:30 AM
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Re: Dead Spot in Acceleration 2013 Jeep Grand Cherokee WK2 3.6VVT

Quote:
Originally Posted by hot-rod View Post
I to feel forced to use the auto stick or to be in sport mode to get the responce
Greetings,

I have the same problem with my 2011 3.6. After the engine broke in, the response got better. I still use the auto stick and always use the sport mode for the highway as long as conditions allow. Also, turn off the Hill Assent option if you do not need it for city/highway driving. After 28K on the engine now, I still like the Penastar 3.6.

Now, on few suggestions by others and reading in this forum discussion, I should look into a Cold Air Intake (CAI) and possible adding a dual exhaust system.

For CAI's, Mopar has one, others are from K&N and Airaid just to name a few.

Otherwise, I love the JGC.

Best for now.
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