How do you know when you are in drop cylinder mode on a 2013?

Is a light supposed to come on when the Hemi goes into 4cyl mode? Just curious.

Well, the "ECO" light will be on, but mine still comes on with MDS disabled so I am incline to believe that is not the only way to know.

For the most part, I could hear it, and feel it.

On a side note, the truck drive much nicer without it. IMO.

I have never seen an ECO light or any light for that matter that would indicate 4cyl mode. Maybe the 2013's no longer have the light?

That's possible. Not sure why they wouldn't have some notification. Can you hear it?

Originally Posted by gutty96

That's possible. Not sure why they wouldn't have some notification. Can you hear it?

Not really sure. Could be in 4cyl mode or might just be in lockup on the converter. All is pretty seamless, and since no indicators appear on the dash, I'm not sure if it is doing it or not.

on 2009-2012 trucks there's a menu option to turn if on/off, look for an option to turn it on. i turned my ECO light off around the 3rd day of ownership. bugged the shit out of me.

Originally Posted by YELLOWHEMI

I have never seen an ECO light or any light for that matter that would indicate 4cyl mode. Maybe the 2013's no longer have the light?

You have to turn it on in your settings menu

Eco is just telling you that you are driving in an economy fashion. MDS just kicks on after ECO light is lit since MDS is driving in an economy fashion.

Originally Posted by War Machine

You have to turn it on in your settings menu

Went through the menu and found nothing. I am obviously missing it. Probably best that it doesn't light up anyhow, as others have said it is irritating.

Originally Posted by YELLOWHEMI

Went through the menu and found nothing. I am obviously missing it. Probably best that it doesn't light up anyhow, as others have said it is irritating.

It was never the light that was irritating. I look at the road, not the gauges.

What I found irritating was the constant in and out of MDS as the throttle goes up and down.

Originally Posted by gutty96

It was never the light that was irritating. I look at the road, not the gauges.

i refuse to look at the road. i drive solely based on gauges.

Originally Posted by Porter_

i refuse to look at the road. i drive solely based on gauges.

I LOL'd

2013 still have it. Lower left and it lights up green.

I might turn my mds off. You guys like it off better?


Tapatalk using iPad.

Originally Posted by ..stiffler..

2013 still have it. Lower left and it lights up green.

I might turn my mds off. You guys like it off better?


Tapatalk using iPad.

You can't turn if off completly without a tuner.

Unless you want to run around in Tow-Haul mode all of the time.

Last I checked that also keeps the truck from shifting into it's final overdrive, which is kind of pointless when trying to save fuel.

I have it off in my truck because with my generation's slight lack of lowend torque, it would keep turing on and off, and with my exhaust that got really annoying.

Originally Posted by wyat72

You can't turn if off completly without a tuner.

Unless you want to run around in Tow-Haul mode all of the time.

Last I checked that also keeps the truck from shifting into it's final overdrive, which is kind of pointless when trying to save fuel.

I have it off in my truck because with my generation's slight lack of lowend torque, it would keep turing on and off, and with my exhaust that got really annoying.

On my truck to disable MDS i just manually shift it to 6th. It doesn't go into MDS and you get all your gears. When you come to a stop, it still reads 6, and will never go into MDS.

I never have a problem with it in city driving.

Originally Posted by HemiMagnum

On my truck to disable MDS i just manually shift it to 6th. It doesn't go into MDS and you get all your gears. When you come to a stop, it still reads 6, and will never go into MDS.

I never have a problem with it in city driving.

x2. And if the ECO light is on the truck IS in MDS.

Originally Posted by HemiMagnum

On my truck to disable MDS i just manually shift it to 6th. It doesn't go into MDS and you get all your gears. When you come to a stop, it still reads 6, and will never go into MDS.

I never have a problem with it in city driving.

My bad, I forgot the 4th gens have ERS.

Before the dealer flashed my 09, the 'Fuel Saver' light was synch'ed directly with the operation of the MDS system ('Fuel Saver' is the predecessor of the "ECO" light found on later models.)

After the flash, the F.S. light would come on more often and for longer amounts of time, however, it was no longer directly synched with operation of the MDS system. (MDS would engage/disengage while F.S. light was on.)

In my 09, the F.S. light itself can be turned off via EVIC, but MDS, w/o a tuner, can only be disabled via 'tow mode' or manually shifting to "5" (No '6' in my truck)

I like my MDS. I have a 24 (or 22, cant remember) SI/SO Mufflex and noise is not an issue. I do a lot of city driving in F L A T areas of Houston and it stays engaged quite a bit.

NOTE: MDS stays engaged a lot more with my Michelin MS/2's that it ever did with those *#%^*^% Good-for-a-year OEM's!!! That in itself should speak volumes about the OEM tires.

Originally Posted by YELLOWHEMI

Went through the menu and found nothing. I am obviously missing it. Probably best that it doesn't light up anyhow, as others have said it is irritating.

The ECO light on/off is located on the radio settings not on the EVIC.

* Settings
* Display
--- * Page down
* Fuel Saver display (last one on second page)

I have had two flash updates. One way back in the first year and another a few months back. From the first flash update my Fuel saver light and MDS are the very same instant. With the Magnaflow muffler I hear it distinctly. I also can feel it. I work at keeping it in MDS. I can stay at 35/40 mph on rolling up and down roads and even maintain it on the UP part of the inclines. Unless I idle a lot or a lot of stop and go I'm always in or very near 19mpg consistently. I drove 77 miles on interstate last night in 31 degrees,light rain and pulled in my drive showing 19.6 mpg. 65 to 72 mph.