What is MDS? Multiple Displacement System: How to Disable MDS Temporarily

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1A Auto: Repair Tips & Secrets Only Mechanics Know

Күн бұрын

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What is MDS? You might wonder that if you own a Dodge or Ram truck with 6 or 8 cylinders! It stands for multiple displacement system, and it is a fuel efficient mode for your car or truck when it doesn't require full power. But what if you want full power all the time anyway? In this video, Len shows you how to temporarily disable the MDS in your car or truck temporarily.
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⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

Пікірлер: 137

@timbrown8038 10 ай бұрын

My lifter collapsed at 96k in my 2012 ram. Just had all replaced and camshaft. I had them disable the MDS. She's a full time 8 now like mother nature intended.

@hubertconover7616 8 ай бұрын

I have a 2021 Ram and I was very unhappy with it and until I watched this video after I deactivated the MDS it like driving a brand new truck this video was a big help thank you so much I was ready to get rid of it.

@MrBullya 2 жыл бұрын

I paid for 8 cylinder.. I want all 8 cylinders! Idk why they did this

@Ksmithy1080 2 жыл бұрын

I get 28mpg on the highway on my way up to Denver, I love MDS when needed.

@jackmioff9919 2 жыл бұрын

@@Ksmithy1080 same I just put my hemi in sport mode when I wanna go fast

@Dingbobber 2 жыл бұрын

@@jackmioff9919 Does sport mode disable MDS?

@tdcenthusiast 2 жыл бұрын

@@Dingbobber Nope, not even in Track.

@theegocalledjeremy2226 2 жыл бұрын

For reasons that had nothing to do with any one person.

@elcompa377 2 жыл бұрын

Dude great video! Very very clear

@bobbyfinley6104 Жыл бұрын

Man you're smart on every time I love watching your shows man I've learned so much from you keep up the good work I have a 2017 so this came in handy with my AC and muffler delete when it kicked in the four cylinders it sound like I had a hopped up on crack Subaru and I hated it

@football-iv8yi Жыл бұрын

I bought a used ram and if all the videos I've watched, your's are the most informative! I like, that you get right to the point! Thank you!

@petertensuda1192 6 ай бұрын

Thank you for this.

@jakemason9436 3 жыл бұрын

Thanks Les. I have a 16 Ram 1500 5.7 and have used this method.

@stopdalies 2 жыл бұрын

I get a lot of juddering at about 2000rmp but once I do the gear shift (automatic) to 8 it stops. Does that mean it's the MDS system?

@robertwoods6696 2 жыл бұрын

Have a question for you I have a 2007 Dodge Ram with a 5.7 hemi in it I'm having problems with my transfer case it just went into basically neutral cuz I can't shift it from four load of four high from four high to 804 or in the two wheel it just will not move now what do you what do you think I should do

@jonnn983 3 жыл бұрын

Would this work on my 09 chrysler 300c hemi?

@joed1244 2 жыл бұрын

How to diagnose a bad mds solenoid? Mine chatter when they kick in. Need to figure out which one. Thanks !

@teagle148 9 ай бұрын

What tuner would you recommend for 2010 ram 1500 5.7 slt crew cad Bighorn

@CaptTetanus 9 ай бұрын

I figured this out on my own today and then saw that someone knew about what I found out!

@betoromero8722 11 ай бұрын

Is this good or bad l, for the engine, over long period of time? I have a 2020 ram 1500 with low miles, so I want to make sure I take care of the truck through out the time I have it.

@greigdavis6383 2 жыл бұрын

I have a 2021 Grand Cherokee L and it runs horribly at 15k RPMS at low speeds. Vibration in steering wheel and gas peddle. Looking to add tuner to turn off MDS. What is the best tuner to buy?

@diego19110 Жыл бұрын

THANK YOU SO MUCH FOR YOUR VIDEO. MY QUESTION IS IF IT WORKS THE SAME WAY IN THE DODGE DURANGO OF 2005. PUT IN "D" and activate the tow haul. Thank you very much greetings from PERU.

@7UpYors 2 жыл бұрын

So deleting my MDS with my Diablo tuner i3 its safe? No check engine light will come on? The 8-4cyl drop its annoying with my Flowmasters🤦

@bradgilchrist-wy5gn 5 ай бұрын

Thanks!

@JacksonGuitarsPlayer03 2 жыл бұрын

I love older trucks for reasons One reason They are perfect. I want all the power I simply put my foot down. Even half throttle that old 5.7 would go up a hill up to 45MPH. Can cruise just fine also

@Worldrecord 2 жыл бұрын

How do I deactivate the mds for a 2017 DodgeDurango RT?? Many thkx and big like😎🙏

@lelandlabossiere6595 2 жыл бұрын

Thank you

@ermr9563 2 ай бұрын

Thanks bro 🙋🏽‍♂️🫡

@socalRooster 2 ай бұрын

Does this tow/haul button also work for 2007 jeep grand Cherokee 5.7 to disable MDS

@SBDavin 9 ай бұрын

I prefer using the Auto stick to put mine in 6th to deactivate it. The Tow mode seemed to rev the engine when I let off. I think it's designed to use the gears to slow down the vehicle. Helpful if a trailer wants to push you.

@dexter1706 22 күн бұрын

does anybody know if this will mess up the transmission? I saw a video and in the description the guy said after he recorded the video, this method "screwed his transmission" but that was on a 6.2l 2500, i have a 2017 1500 sport, just want to make sure.

@dannycameo859 Жыл бұрын

Great video, you guys' videos are always straight to the point and informative use the many times to fix family vehicles. To get to the point I have a 2022 Ram power wagon with the ZF 8 speed, now you did go through the process of how to shut MDS off with my type of shifter, when I push the up and down buttons on the steering wheel and put it in 8th gear on the dash as the maximum allowable gear, you're saying that will deactivate the MDS system until I turn that back to drive, even on the 6.4 l Hemi? I'm guessing that as long as it's the ZF 8 speed it will work?

@tysonl9782 Жыл бұрын

I have a 2011 57 hemi Big Horn, and when the MDS is activated, I can hear some sort of ticking like someone’s got a card on a bicycle wheel and it’s kind of a annoying but when I put it into manual, I don’t hear that anymore, so I guess my question is is it harmful to drive in manual all the time except for when you’re on the freeway?

@josearrvizo359 2 жыл бұрын

On a 2007 1500 ram 5.7 4w drive how would I take it off

@chrisstrain6861 2 жыл бұрын

I work on aircraft and I wonder what damage overtime must does to the cylinders as its turns on and off and the cylinders run cold. Can't possibly be good for longevity of the motor

@BrokeMechanic 2 жыл бұрын

Fails and causes lifters to rub on camshaft

@joblessalex 2 жыл бұрын

Same thing in Honda odysseys will cause the piston rings to align and oil to seep into the cylinders. Keeps everything lubed up, but that oil burns when it fires again. Pretty heavy oil consumption. About 1 qt every 1000 mi or more.

@joshuamoore24_7 Жыл бұрын

No it's not good for the engine and it wrecks the cam and lifters.

@jordanlacoste4062 2 жыл бұрын

Would driving with MDS deactivated help with the lifter lubrication problems? I have 104k on my 2016 and have been turning off Everytime I drive with the method demonstrated! I don’t notably have a tick! So just curious

@BWADaniel 2 жыл бұрын

No, we’ve actually figured out that your lifters get robbed of oil with MDS turned off, unless you have the solenoids replaced with plugs. Makes sense. I drive around constantly in manual mode, and my lifter just exploded. Currently rebuilding.

@BWADaniel 2 жыл бұрын

Not every lifter. I believe it’s only the Non MDS lifters that get robbed of oil which is stupid. When your engine is working the hardest, the MDS solenoid slows down the flow of oil going to the non MDS lifters.

@350Zquicksilver Жыл бұрын

@@BWADaniel - Trying to understand... Best scenario for motor lubrication is to remove the MDS system, plug the solenoid holes, replace MDS lifters with regular lifters, get a MDS delete tune? Turning it off electronically, like this video or a (MDS delete tune) is just as bad as leaving it activated?

@sstatic6093 Жыл бұрын

So will the MDS affect the truck in a bad way?

@Rigo.25 2 жыл бұрын

What tuner and where can u get one to remove this Mds permanently

@xLSU0408x 2 жыл бұрын

Pulsar. It hooks right into your ECU. If you get anything that plugs into your OBDII, you have to send your ECU to the factory (Edge, Diablo, etc) to have it unlocked. Pulsar goes through it the way it is, and all 4 levels have an MDS OFF option.

@Cov930 3 жыл бұрын

Completely agree . I had an older 03 hemi single cab short bed 2x4 an Ioved that truck . Went to the newer 2012 hemi with the mds an what an awful truck . So many electronic problems . Mds sounded horrible with an exhaust on it . Cam lifter failure . Traded that in for 2010 6.1 challenger 6spd that now has a 426 Arrington stroker motor , comp an longtubes an my god that is a hemi

@moemoe48210 2 жыл бұрын

Lol I got one rn how much miles before it failed ? 😂 u probably needed a tipm

@MB-tr5sz 2 жыл бұрын

Essentially

@john1240able 2 жыл бұрын

I got Charger V8 has the mds is bad for engine going from 4 cylinder to V8 all the time.

@MrLaurenceDunn Жыл бұрын

MDS has caused me a few unnecessary problems. It would have helped if the manufacturer had added a proper "MDS on/off" switch feature to give the driver the option to disable the MDS. Tow/Haul removes the use of overdrive on 2005 HEMI's. But I've learnt to live with it now after 18 years...

@craigvelardi7420 Жыл бұрын

Yeah, I've been manually turning off the MDS because of a bad rumbling from the engine if it's on when switching from 4 to 8 cylinders. But now I've read that with the MDS off, oil lubrication to certain cylinders is diminished and can cause lifter problems. I'd like to know if this is a problem or not because I don't want to ruin the engine, yet it runs crappy with the MDS on. I had my truck checked out three times, two of whuch were at the dealership and they felt and heard what I was talking about and the answer I received was that it was just the characteristic of the truck. They also stated that on earlier trucks there was a computer update that fixed the rough transition, but nothing for my truck. Not acceptable, because the truck runs crappy with it on, but if turning it off might ruin the engine, then what the heck? Does anyone else have information as to the engine getting damaged if the MDS is turned off?

@ryanhemming9546 Жыл бұрын

MDS is useless and creates problems. I tuned my 06 with a superchips flashpaq. Disabled MDS entirely. Runs a lot smoother and didn't change the MPG. Over 2 years, no problems.

@stranger74598 Жыл бұрын

What about the dodge changers 2008

@roberttischer3056 Жыл бұрын

What do you do for a 07 ram 1500 5.7 with MDS that doesn't have anything you show

@tryduck6993 Жыл бұрын

reprogrammed / tune

@GloryOfSatan 3 жыл бұрын

Does the 2012 ram 2500 5.7 have this feature?

@jeepguy95 3 жыл бұрын

Yeah, all 5.7L HEMIs have it.

@tryduck6993 Жыл бұрын

No yours does not have MDS on a 2500

@ElevatorWasher5000 2 жыл бұрын

Tow haul mode turns it off and the truck thinks it’s pulling something big. (Ours doesn’t show eco or MDS)

@510Redneck Жыл бұрын

Yeah I'm kinda confused about this video because if he is in a V8 then it did exactly what he said it wouldn't do later on in the video - deactivated it.

@tryduck6993 Жыл бұрын

Tow/haul removes the highest gearing and keeps it from shifting into that gearing. The MDS disable just disables the MDS from coming on with the highest gearing option still allowed ... until you turn truck off and restart it. Then you must disable it again.Unless you have a tuner that disables it.

@jonjon3206 2 жыл бұрын

How about they add a disable button

@joseluiscolon4640 3 жыл бұрын

I disabled with a Diablosport Tunner. And the fuel comsumtion is the same.

@ninjazx10r96 2 жыл бұрын

How much was the tuner and did you do it yourself

@joshuarunions2114 2 жыл бұрын

@@ninjazx10r96 I paid about $300 for mine and it’s super easy and self explanatory when you click advanced tune

@BradfordC 10 ай бұрын

Does it stay in 6th gear though?

@supermoistdeluxe Жыл бұрын

I'm glad your wearing gloves

@warionation2648 5 ай бұрын

I don’t get it, if sport mode does not turn it off, then how do you turn it off on the dodge challenger?

@cc-fn3mc 2 жыл бұрын

Is the MDS bad for the engine? I have heard it damages the cam and lifters over time

@brandonUwanawich954 2 жыл бұрын

@@frivera735 my engine blew up due to the mds they even have a person from Detroit come to Florida cause they been getting a lot of complaints

@vr4787 3 жыл бұрын

I have a 2020 Ram 1500 classic with the 5.7 and you don’t notice MDS at all, I guess in older models it’s more noticeable. Getting close to 25 mpg highway, no issues.

@1AAuto 3 жыл бұрын

+V R Thanks for the feedback!

@w.e.s. 2 жыл бұрын

Ull notice it if u had loud exhaust its annoying sounds like a skip

@matthewdupuis7522 2 жыл бұрын

I have the 6 speed hemi. 2013. Do I have to be driving to shut the mds off or put the truck in drive do the negative and positive up to Number 6? Thanks so much.

@elijahdelagarza8816 2 жыл бұрын

you have to do it every time you get in the truck

@tryduck6993 Жыл бұрын

Each time you restart truck it resets and has to be done again. Unless you have a MDS disabling tune/tuner which is 300-400.

@gregholland9251 Жыл бұрын

My dad’s ‘78 Cordoba had an economy light that would come on when you eased off the throttle.😂

@Weldemall2 Жыл бұрын

How can i turn off mds for my 2023 ram laramie 1500 this doesnt work for it and tow mode isnt an option the down shitfing sounds terrible with a flow master outlaw muffler?.

@1AAuto Жыл бұрын

+Easy Freazy We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

@carrierichardson7606 10 ай бұрын

Hello how's your well I have a 2013 ram 1500 SLT 5.7 hemi the dealership is telling me that my motor is gone and I need to get a new one but like I told the dealership my transmission was the problem it was not shifting like it's supposed to I need help ASAP

@1AAuto 10 ай бұрын

+carrie richardson We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

@carmac1652 2 жыл бұрын

Does it go back to MDS when you park the truck ? Thanks great information 👍

@joed1244 2 жыл бұрын

When you shut the truck off it will be back on when you start it again

@devinbourgeois6560 11 ай бұрын

my 2019 Ram Limited doesn't have the shift button

@joshuamoore24_7 Жыл бұрын

On my jeep it sounds like when I press the tow haul button it's running 8 cylinders all of time.

@kevinleach9631 3 күн бұрын

From what I understand u can’t shut down the mds system! It’s all in accseleration?

@brandonherbert3507 2 жыл бұрын

I have a 2008 that’s has mds , I don’t have the option to select gears I just have drive first and second forward gears

@brandonherbert3507 2 жыл бұрын

How can I shut it off

@tryduck6993 Жыл бұрын

@@brandonherbert3507 tuner

@josephwollslair8366 9 ай бұрын

Wouldn’t this keep the engine from wearing evenly?

@jeepguy95 3 жыл бұрын

MDS is only on the Rams with the 5.7L and 6.4L HEMI V8 engines. The 3.6L Pentastar and 3.7L Power-Tech V6s and 8.3L Viper V10 all don't have it.

@jimmymeister8030 2 жыл бұрын

The 3.6 has it

@tryduck6993 Жыл бұрын

Only Ram 1500 with Hemi has MDS.The Rams HD 2500,3500 all have non MDS cams/Non MDS lifters without MDS solenoids. They have Blank plugs in place where the MDS solenoids go. I guess a crew cab 4wd Ram 1500 was just to small to keep MDS off it because people rushing out to get these trucks because of the such awesome fuel mileage they wont get even with MDS .....

@brenbell196 2 жыл бұрын

This does not apply to my 2007 1500.

@njjeff201 2 жыл бұрын

So MDS OFF is running on all 8? With gas approaching $4 I’d like run most fuel efficient. No towing here. Don’t you want trans in its highest gear to save fuel?

@harrirauhanummi 2 жыл бұрын

Umm NO.

@tryduck6993 Жыл бұрын

You bought a truck and run it daily for fuel efficient huh. Most buy them for power and hauling.

@DylanPorto45 Жыл бұрын

buys a truck but is worried about gas lol

@crazyeats1147 2 жыл бұрын

I have a 2014 Diablo sport tuner with that work on a 2012 grand jeep laredo

@dirkmulagin5774 2 жыл бұрын

what if I just unplug the silanoyeds and drive my truck eneny way

@tryduck6993 Жыл бұрын

CEL.....

@jesusisaliveforyou7076 11 ай бұрын

What’s going on, on my truck I floor it and the mds doesn’t go away?

@1AAuto 11 ай бұрын

+Jesus is Alive for you We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

@lqdxoni1 3 жыл бұрын

Pedal monster can fix that

@on-wl4yu 2 жыл бұрын

How does the MDS turn back on ? Or do you manually turn it back on?

@abecampbell2439 2 жыл бұрын

Once you turn off the truck and turn it back on it will automatically go back to mds

@jamesthomas7977 2 жыл бұрын

If you have it in the highest possible gear as he discusses, to go back to mds, just flick the + button once more and the mds will turn back on.

@barrybebenek8691 3 жыл бұрын

If you want to save gas, buy a Civic. It’s a truck. V8 is the only way! 🇨🇦👍🏼

@michaelrasmussen426 3 жыл бұрын

This is the way

@jamesshenay3426 2 жыл бұрын

You betcha.

@jamesgross3764 2 жыл бұрын

I totally rebuilt the engine in an 06 Dodge Magnum put a non MDS lifters and cam in it and left the solenoids it runs great if I use manual mode but if I leave it it cuts out the injection and the fire to four cylinders I just unplugged it is there a way I can just completely go around it because my check engine light is on I looked at the Diablo tuners 400 and some dollars I would just like to get with someone and turn off my MDS

@jamesgross3764 2 жыл бұрын

5.7 hemi

@peterdragonz4219 3 жыл бұрын

Like I told the salesman on my 3rd HEMI truck... “I’m not buy a HEMI to save gas!”

@josephkrause5290 2 жыл бұрын

Probably retracting that statement now! Because I definitely am. About to be $4.50 a gallon

@harrirauhanummi 2 жыл бұрын

@@josephkrause5290 That's still cheap af. Welcome to Finland. Gallon is about 10 dollars here (2,5 euros / liter)

@danielb-c9100 10 ай бұрын

GM trucks are after a few management. But they have the same problem.

@zakstahl2044 2 жыл бұрын

thankjs for the info have a tuner but i don`t delete mds on my 2013 ram not since gas got rediculous it has a 80,000 mile 2014 replacement motor i have flowmaster 40 series offroad edition when mds come on my truck sound like it has a jake brake (retarder)it turns off instantly when i push the pedal no delay i also have a throttle response enhancer makes jump a lil better off the line also it dont give any more power or torque but it sure makes it funner ton drive and only cost $85 same damn thing as roar pedal color and price is the only difference

@1AAuto 2 жыл бұрын

+Zak Stahl Thanks for the feedback!

@Tom-ic7hw Жыл бұрын

RUNNING 4 dead cylinders would seem to be hard on an engine

@skimask5049 Жыл бұрын

Yet not a fan of mds my ole honda pilot did the mds and now it's blown up due to excess sludge ill keep my 2000 dodge ram 5.9 magnum

@KidFriendlyGaming 7 ай бұрын

I could see doing this at 65+ mph but not randomly all the time. I need to get this turned off completely

@malamri424 2 жыл бұрын

I had an MDS lifter rotate 90 degrees and ate through the cam in a u-shape manner.

@tryduck6993 Жыл бұрын

You had it rotate really? You do know your lifters are inserted into a holder which prevents that from even possible. The lifters top has 2 flattened sides on top so they can not turn at all once the go into the lifter holders and then bolted down .No way to even push the lifter into holder unless the roller is orientated properly to roll on cam lobes. Im betting your roller just locked up and started to chew the cam and did not rotate, then it got deep enough into the cam that both sides of the lifter legs that the roller pin goes through began to help chew into the cam also and causes the lobe to look like its a U shape chewed out of the lobe/lobes (usually happens to lobes beside each other from debris locking up that roller from the real lifter failure. This is normally what it looks like on every failed lifter/cam I have done. I'm guessing you ignored the tap noise and just kept driving it as if it was just a normal hemi tick. Most are failed lifter on a non MDS cylinder. Only 4 cylinders have MDS lifters.Cyl 5 is most common failed lifter I have come across and it is a non MDS cylinder. Not the only place they fail now but most common one. Replace the MDS solenoids (if your not deleting them) because they will be packed with metal sludge.Ya break them most times removing anyhow unless ya blow them out. Easier to the just screw them and use hammer claw to pop them out.Can use compressed air but when your in a bay with other vehicles beside you dont want it to launch and dent paint or spray nasty oil out all over everywhere.Nice easy and no mess with the hammer claw.

@nedunonnyp704 Жыл бұрын

01:04 6 Cyl And 8 Cylinder Transmissions? Hmmm. 🤔😳🤔😳

@Fatedcauze Жыл бұрын

This method doesn’t work on my vehicle. When I come to a stop, it downshifts into 1st, then has to be manually shifted again.

@PullingThru_at100 3 жыл бұрын

What about Chevy ?

@davidchurchill1651 2 жыл бұрын

Chevies have AFM (Active Fuel Management).

@markevans3589 3 жыл бұрын

I had a 2013Ram 1500 5.7 that could barely tow 4k.

@tryduck6993 Жыл бұрын

So people buy a huge truck either 2 door ,4 door , or crew cab with one of the largest most powerful engines so you can have great fuel mileage and not POWER huh? You rushed out to buy these trucks to get that 50mpg and not to pull something huh. Is that like buying a ford focus,neon,civic pouring in money to try to make a speed demon instead of just buying high powered sport car? Humans make no sense at all EVER...