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  #1  
Old 10-30-2011, 06:57 PM
Ricky2011 Ricky2011 is offline
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Unhappy ECO Engine Miss or Shudder

My truck is three months old with 2100 miles now. It's the best truck I've ever owned. I'm having a problem with engine shudder on light acceleration I assume when cylinders displace. Dealer has not checked yet but tells me that dodge is working on this and to keep checking back with them. Getting a little frustrated with this, any ideas?
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Old 10-30-2011, 07:51 PM
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Quote:
Originally Posted by Ricky2011 View Post
My truck is three months old with 2100 miles now. It's the best truck I've ever owned. I'm having a problem with engine shudder on light acceleration I assume when cylinders displace. Dealer has not checked yet but tells me that dodge is working on this and to keep checking back with them. Getting a little frustrated with this, any ideas?
It's normal to get that when the cylinders are deactivated - would be nice to have the ability to turn that off. I'm kinda used to it now so it's not that big of a deal anymore. Just modern technology allowing the higher EPA ratings.
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Old 10-30-2011, 08:21 PM
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I am not sure just what speed the MDS kicks in (cylinder deactivation)
The ECO light coming on is nothing other then telling you that you are doing a good job of driving ECOnomically, it kicks in at 28 miles an hour
The way most of us drive our Rams, is to not use the very top gear in town, you don't need to have the Torque Converter Locked in while in town or city driving, it also keeps the ECO light from coming on & your cylinders all stay functioning.On the highway put it in high gear & don't baby it
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Old 10-31-2011, 02:35 AM
gale155 gale155 is offline
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I certainly don't want to take anything away from the great Hemi, but this sort of thing is one of the reasons I opted for a 4.7. I owned a 5.3 Monte Carlo with MDS, and I never did like it.
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Old 11-02-2011, 04:19 AM
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Run it in Tow/Haul mode and then it is less noticable and gives it a bit more 'pep' in the lower RPM range
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Old 11-03-2011, 10:38 AM
dkerr24 dkerr24 is offline
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The recommended way from Dodge to disable the MDS is to switch the transmission from "D" to "5". This is done by a single click of the "+/-" switch on the column shift, or a single click to the left of the floor shifter once you are in "D".

Do not use the Tow/Haul mode if you only want to disable the MDS (ECO)!

Darin
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Old 11-03-2011, 02:36 PM
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Have been riding around in 5 like Darin wrote about for three days now and I like the truck a whole lot better. I was thinking the truck was a mistake and that I should get rid of it. I still wonder what my service advisor meant by Dodge is working on this problem. He said the repair would have something to do with weights and to keep checking back with him. Thanks for everyones help and advise.
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Old 11-03-2011, 02:45 PM
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The dealership possibly thought that you were experiencing the torque converter shutter, that some people are experiencing,
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Old 11-03-2011, 08:48 PM
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I think the problem I was having before my TC swap was very similar to what you are describing, my MDS is so smooth now. I used to be able to feel it, now it's just noticeable because of my exhaust.
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Old 11-13-2011, 10:47 AM
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There is a MDS flash that helps a bit. I had it done two months ago. The MDS shudder is still there but not as bad. I keep the MDS off almost all the time by manual shifting to 5. But it sucks that the MDS does this and we have all had to adapt. I will never buy a MDS engine again.
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