Is there any way to disable MDS without a tuner/tune?

[theblet]

I notice MDS all the time. My wife doesn't. Maybe it's because she's always talking

 

[mikeru82]

The MDS kicking in and out was noticeable on two of the three 5th gens we've owned. Even on the one that wasn't really noticeable I could tell if I really paid attention. But on the other two it was definitely more obvious.

 

[sinclair253]

If you can hear or feel it your truck is broken. I've owned 3 Ram's with MDS and it was completely unnoticeable in all 3.

I normally let mds do its thing for the most part. It’s not very noticeable with my exhaust. No drone either

The real reason to disable MDS is not about feeling! It's because it destroys your cam shaft and lifters over time. Unless you have a warranty to cover it you should probably be worried about it. My truck is in the shop now getting the cam shaft and lifters replaced and a fight with the warranty company to just replace the whole engine. In $'s, if i had to pay for this out of poclet it would have been over 10k! The dealer even admitted this is a known issue with the rams and to look at measures to disable the mds.

 

[Mojo88]

The real reason to disable MDS is not about feeling! It's because it destroys your cam shaft and lifters over time. Unless you have a warranty to cover it you should probably be worried about it. My truck is in the shop now getting the cam shaft and lifters replaced and a fight with the warranty company to just replace the whole engine. In $'s, if i had to pay for this out of poclet it would have been over 10k! The dealer even admitted this is a known issue with the rams and to look at measures to disable the mds.

Interesting take, I've heard this before. I've also heard (more frequently) NOT to disable it, haha. There's no clear winner. But many folks seem to agree on the theory that a limited oil supply (especially at idle) to lifters and cam is the cause.

Whatever the cause, the infamous "hemi tick" is too common, that's for sure.

I disabled my MDS (in the tune, using HPTuner) and it was one of the best things I ever did on that truck!!

 

[mikeru82]

That’s the problem, lots of theories but no real data on what’s causing the cam/lifter failures. It’s not just MDS lifters that are failing, and even engines without MDS have the same types of failures. I’m not convinced that MDS has anything to do with it. I’m more of the theory of soft cams that are the root cause. I’ve seen cams with damage and the lifters on the damaged lobes are still good.

Like I’ve said earlier in this thread and in others, I don’t disable MDS in an attempt to prevent cam/lifter failure. I just don’t like the idea of an engine only running on half the cylinders or how it sounds. I really don’t care if anyone else doesn’t think that’s a sufficient reason. It’s enough of a reason for me.

 

[CHeYeNNe71]

There's a guy with 4th Gen, shut off MDS from day 1 and still ate the motor. I shut it off because it's useless.

 

[jamiehughes]

if you educate yourself on how the MDS system works on the hemi it actually says it floods the lifter with oil shutting the cylinder off.. i believe most of the lifter issues come from oil change intervals and excessive idling not so much the MDS system..

 

[Trooper4]

So much for the OP's question.
This discussion went south faster then a sneaky Peter when the husband comes home early.

 

[mikeru82]

So much for the OP's question.
This discussion went south faster then a sneaky Peter when the husband comes home early.

Since the OP's question was answered within the first few posts there's not much more to say about that subject. So like many other threads, it has moved on to other subjects. The thread should probably just be closed at this point unless the OP would like to keep it open for whatever reason.

 

[1791]

pulsar works like a champ.

 

[silver billet]

pulsar works like a champ.

Since installing it, I can sleep in piece knowing the buttons on my steering wheel will live to serve another day, I don't they they were engineered to survive the frustration of an MDS hating owner.