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Old Sep 18, 2017 | 05:09 AM
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Default Mds
2009 Ram 1500 5.7
My question is can the MDS be "turned Off". I am not original owner, and I can never tell if the MDS is working
 
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Old Sep 18, 2017 | 08:31 AM
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Why would you want to turn it off?
 
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Old Sep 18, 2017 | 09:03 AM
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I don't want it off. I bought this truck last year, and I haven't been able to tell when the MDS is on, so my question was is it possible that someone has turned the MDS off, or disabled it somehow
 
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Old Sep 18, 2017 | 09:17 AM
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May wanna get a build sheet for your truck, and see if it is equipped. Can get one here. Just click on the 'equipment listing' link.

Apparently, it IS possible to disable it..... I believe it requires reprogramming the PCM though....
 
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Old Sep 18, 2017 | 09:54 AM
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Got a build sheet - 5.7L V8 HEMI MDS VVT Engine
 
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Old Sep 18, 2017 | 10:05 AM
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So it is either working fine, or not at all.

I think it's pretty picky about just what circumstances it will drop several cylinders.....
 
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Old Sep 18, 2017 | 10:23 AM
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I bought a Superchips JUST for the sole purpose of turning MDS off. Someone else could have done the same thing before you.
 
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Old Sep 18, 2017 | 11:03 AM
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I don't think it is working at all
 
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Old Sep 18, 2017 | 03:33 PM
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Can you talk to the previous owner?
 
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Old Sep 18, 2017 | 04:31 PM
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It was a company, so I don't think they would have turned it off
 
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