Cylinder deactivation?

[turkeybird56]

THE MDS is noticeable if you are familiar with the setup and looking for it. When on an open roadway with Cruise Set, I leave it on. When on winding roads with various ups, downs and level, I use manual gear and deactivate it. Just what I do, as the MDS is a PITA when on up and down country roads.

 

[ksn240]

I’ve never seen the eco light on mine

You have to turn it on in the settings in the radio.

 

[SJ345]

You have to turn it on in the settings in the radio.

Thanks!

 

[Joshua Thiessen]

All mds does is prematurely wear out 4 cylinders, reduce power and make your truck sound like ****. Do your trucks a favour and disable it.

 

[adrianp89]

All mds does is prematurely wear out 4 cylinders, reduce power and make your truck sound like ****. Do your trucks a favour and disable it.

Got some sources to back up your claims? Sounds like a bunch of BS to me.

 

[tidefan1967]

Got some sources to back up your claims? Sounds like a bunch of BS to me.

Well it may or may not wear out the engine prematurely but the little bit of lag that occurs while switching from four back to eight cylinders is noticeable. Also I think that we can all agree that if you have an aftermarket exhaust that helicopter sound that the MDS makes in four cylinder mode does sound like **** compared to running on all eight.

 

[turkeybird56]

Just for the sake of conversation : JOSHUA< do you know a way to permanently disable besides shifting to manual mode all of the time. When I had my 2012, I asked DEALER to turn off. they told me no way and their answer was a BIG NO... I do know our MDS is a lot better than GM, but only IMHO...

 

[Tach_tech]

It can be disabled with a tune.

 

[adrianp89]

Well it may or may not wear out the engine prematurely but the little bit of lag that occurs while switching from four back to eight cylinders is noticeable. Also I think that we can all agree that if you have an aftermarket exhaust that helicopter sound that the MDS makes in four cylinder mode does sound like **** compared to running on all eight.

The lag is the transmission deciding what to do, not the MDS. On my '13 I had no issues with MDS drone and my aftermarket exhaust... but either way that is not Ram's problem but yours lol

 

[tidefan1967]

The lag is the transmission deciding what to do, not the MDS. On my '13 I had no issues with MDS drone and my aftermarket exhaust... but either way that is not Ram's problem but yours lol

It’s not really a problem for me as I remember GMs active Fuel Management and how bad it was and the RAM is noticeably better. Also my truck is stock and the factory exhaust is more throaty sounding than anything the other manufacturers have so I’m happy with it as is.

 

[Terry K]

Im getting vibrations at low speeds. driving in residential areas. is this due to cylinder deactivation?

 

[tidefan1967]

Im getting vibrations at low speeds. driving in residential areas. is this due to cylinder deactivation?

Its possible. Use the +/- buttons on the steering wheel and turn it off and see if it goes way and then you'll know for sure.

 

[Kevin Pine]

I don't notice when my MDS kicks in.

 

[Rogues Gambit]

Newbie question: Tow mode disables MDS right?

 

[brian42]

Im getting vibrations at low speeds. driving in residential areas. is this due to cylinder deactivation?

Sounds like what I experience and it coincides with MDS for me.

I don't notice when my MDS kicks in.

I'm not sure if it is on all Option Groups but on mine there's a way to see the MDS when it's active (I have the 7" TFT dash display). On the DISPLAY settings there's an option for "Fuel Saver Display in Cluster". The default is de-selected. Select it and now a little green ECO will come on whenever MDS is activated.

Newbie question: Tow mode disables MDS right?

Yes, it does.

 

[buddy guy]

I don't notice when my MDS kicks in.

me either. the bit of motor boat sound but zero vibration.

 

[Fireman48]

If I didn't have my "eco" light activated I wouldn't have a clue when it is active. No vibration at all. I do have eTorque which may make it unnoticeable

X

Me neither. I feel nothing.

 

[silverWS6]

I'm coming from a GM truck. There was an aftermarket 'range AFM' disable that you'd plug into the obd port.

Is there a similar option for our trucks? I know about putting the tranny in '-8' but eh, a little annoying to do that everytime I get in the driver's seat.

 

[Irish.]

SliverWd6,
That little thingy can do deactivate the mds but it’s a very pricey toy. I had been doing by put in -/+ model and I know it can be royal pain in butt but get use to it. Tow model can disable also.