Locked out MDS today, OMG, this truck is Amazing!

[Davidloveshishemi]

Locked out MDS today, Amazing! All 8 cylinders all the time is what this truck was meant to have. It has immediate power now, it’s perfect!

 

[Kenepo17ram]

What you mean locked out?

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[Davidloveshishemi]

Using the gear - + to set the highest gear.

 

[Kenepo17ram]

Using the gear - + to set the highest gear.

That's how I do it though ypu have find a diff way

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[Davidloveshishemi]

Oh sorry, no I just found out about that way.

 

[McBroom]

Aphaobd will perminately turn it off with settings. Along with other good **** too. Like turning on the drl tune the trans for better shifts...

Blue Mule

 

[tidefan1967]

Aphaobd will perminately turn it off with settings. Along with other good **** too. Like turning on the drl tune the trans for better shifts...

Blue Mule

I wonder if Alfa OBD would permanently disable it on my Challenger...........going to have to look into that!

 

[McBroom]

I wonder if Alfa OBD would permanently disable it on my Challenger...........going to have to look into that!

Its possible I'll wait to hear back on if it works on it then I'll know it'll work on the wifes Trailhawk

Blue Mule

 

[dhay13]

I always put mine in manual 6th to lock it out. In fact, I filled it up Wednesday and have put about 200 miles on it since with about 95% of that being highway with MDS locked out. My EVIC says average speed so far is 45MPH and my EVIC says 15.8MPG but it is normally about .5 over hand calculated. But today on the way home I initially forgot to lock it out and my 'real time' MPG read 22 on the highway but I manually locked it out and the 'real time' dropped to 19. Road seemed as flat as I could get it and cruise was set at 69 MPH

 

[dexter]

use tow/haul mode ... simple

 

[Wild one]

use tow/haul mode ... simple

Tow/Haul doesn't lock out MDS on the 1500's with the 8 speed.Only thing that locks out MDS on a stock 8 speed truck that hasn't been tweaked via tuning or AlfaObd is to use the up/down shift buttons on the steering wheel.

 

[dexter]

Tow/Haul doesn't lock out MDS on the 1500's with the 8 speed.Only thing that locks out MDS on a stock 8 speed truck that hasn't been tweaked via tuning or AlfaObd is to use the up/down shift buttons on the steering wheel.

Thanks, I drive a 2500

 

[dhay13]

Tow/haul isn't the same as manually using 6th. Tow/haul raises shift points, which raises RPM's. My trucks were harder on fuel using tow/haul than they were just using 6th manually. Manual still lets it shift into 6th and keeps the normal shift points. I do use tow/haul if I'm just running across town just because of convenience but anything more than that I use the manual mode. If towing then I use tow/haul.

 

[Troy Gillis]

Aphaobd will perminately turn it off with settings. Along with other good **** too. Like turning on the drl tune the trans for better shifts...

Blue Mule

Do you have more info on this?

 

[chrisbh17]

I dont know of any way for Alfa to permanently turn off MDS.

And overall, I dont feel like MDS hinders performance of the truck *depending on how you are driving it*. If I really lean into it, MDS doesnt really activate until I back out of the throttle and put the truck under very little load.

Yes, there is a lag time when coming back OUT of MDS, but its not like the engine has 200HP with MDS "on" but not activated, and 395HP with MDS "off" but not activated.

The biggest improvement from a non-tune non-mechanical-change, I think, is the pedal commander (or knockoffs of it). And all that really does is mess with the amount of voltage the ECU sees in regard to pedal position. it doesnt "improve" performance, it just changes the "sweep" of the fun pedal.

 

[CVX20]

On my 2nd CC 4X4 5.7 8 speed 3:21's and really don't see an issue with leaving the MDS on.In fact it hardly ever comes on in my daily drive and if it does it comes off real quick if you even breath on the gas pedal

 

[dexter]

There has been some talk that mds causes engine wear.

 

[RVGuy]

There has been some talk that mds causes engine wear.

If you can find any actual proof of this I'd be interested in hearing it.
I'm not saying it doesn't, just that nobody has ever been able to provide evidence beyond "so-and-so said it does"

 

[Octane]

I read about the mds system about three years ago and FCA said they did testing on the four cylinders that shut down and after extensive testing the wear was very minimal on those cylinders.There was concern about the same four cylinders being shutdown but supposedly it is okay as designed.

 

[OCDTech]

I read about the mds system about three years ago and FCA said they did testing on the four cylinders that shut down and after extensive testing the wear was very minimal on those cylinders.There was concern about the same four cylinders being shutdown but supposedly it is okay as designed.

I heard this as well, and the reason for minimal wear was attributed to the design the used which was to take in fuel wait until compression spark plug ignites after that the valves stay closed keeping the pressured up cylinder acting like a spring. I don't believe other manufacturers do this.