Cylinder Cutoff

[Mprisco10]

So Ive had my 19 Ram for over a month, and wanted to ask about the 5.7 cylinder cutoff. Since I have a short commute to work, I rarely get above 40MPH or so. Low RPM in 8th gear and the engine sounds like its missing. Someone just told me, sales rep didn't, about the cylinder shutdown to conserve fuel.
Is this MFS? It can be turned off if I hit the - button on the wheel? I was really getting pissed about it running poorly and was going to bring it in since I have only 400 miles on it. And I have no ECO light that ive read about. Am I supposed to?

 

[corneileous]

So Ive had my 19 Ram for over a month, and wanted to ask about the 5.7 cylinder cutoff. Since I have a short commute to work, I rarely get above 40MPH or so. Low RPM in 8th gear and the engine sounds like its missing. Someone just told me, sales rep didn't, about the cylinder shutdown to conserve fuel.
Is this MFS? It can be turned off if I hit the - button on the wheel? I was really getting pissed about it running poorly and was going to bring it in since I have only 400 miles on it. And I have no ECO light that ive read about. Am I supposed to?

If I’m understanding your question precisely, yes, that is your MDS(multi-displacement system) kicking in. Or it’s commonly referred to as VVT, which is variable valve timing. Same thing.

And as far as using the +/- buttons on the wheel to disable it, you should be as we can on the 4th Gens but as far as the ECO light, you probably do have that but, that’s a feature that comes disabled as it really doesn’t have anything to do with the MDS. All it does is just tell you that, irregardless of the state of the MDS that you’re driving in a fuel-conservative manner. That’s probably why it comes from the factory turned off and if you want it to light up, you have to go into your Uconnect settings to turn it on.


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[JoeCo]

Yep, first thing I do after I put it in gear, go right to 8th so you don't have to hear/feel that. Much better on the highway though, I do use it when I'm going somewhere of distance at highway speeds.

 

[MADDOG]

Just shift down a gear to 8 before you start off. MDS won't engage if you do. No weird drone, loss of throttle response, etc... will happen.

 

[iLLeStEyECoN]

If I’m understanding your question precisely, yes, that is your MDS(multi-displacement system) kicking in. Or it’s commonly referred to as VVT, which is variable valve timing. Same thing.

And as far as using the +/- buttons on the wheel to disable it, you should be as we can on the 4th Gens but as far as the ECO light, you probably do have that but, that’s a feature that comes disabled as it really doesn’t have anything to do with the MDS. All it does is just tell you that, irregardless of the state of the MDS that you’re driving in a fuel-conservative manner. That’s probably why it comes from the factory turned off and if you want it to light up, you have to go into your Uconnect settings to turn it on.


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VVT and MDS are not the same thing...


2019 RAM 1500 Laramie 4x4

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[pacofortacos]

^^^ What he said.
MDS = multiple displacement = going from 8 to 4 cylinders
VVT = variable valve timing = advancing or retarding the camshaft via the cam phaser.

 

[sandawilliams]

Tow/Haul on my 2014 will lock out MDS. I use it around town all the time.

 

[Irish.]

ah something I am not aware of.. so other words, use the -/+ button to bypass the MDS function.

 

[KJ6MTJ]

I will do the same thing as mentioned up above, put it into 8 via gear limit, especially when you modify exhaust, don't get the odd drone sound and it actually sounds a little nicer when your coming to a stop and the tranny downshifts. If your only going up to about 40 mph, craps n giggles try putting the limit to 7th and watch your current mpg. I found that odd too about the ECO light, had to go into settings to see it, also to see what gear its in say D4 for example. I have heard they have a little gismo that you can plug into the ODB2 port that will disable to MDS but that little toy runs $200 - $300 bucks.

 

[Rogues Gambit]

I will do the same thing as mentioned up above, put it into 8 via gear limit, especially when you modify exhaust, don't get the odd drone sound and it actually sounds a little nicer when your coming to a stop and the tranny downshifts. If your only going up to about 40 mph, craps n giggles try putting the limit to 7th and watch your current mpg. I found that odd too about the ECO light, had to go into settings to see it, also to see what gear its in say D4 for example. I have heard they have a little gismo that you can plug into the ODB2 port that will disable to MDS but that little toy runs $200 - $300 bucks.

Link? I wanna disable that crap