How are the cams on a MDS motor different?
How are the cams on a MDS motor different?
The cams for the MDS motors are unique because four of the intake lobes have a “primary ramp” that takes up the “locking lash” in the MDS lifter before the “secondary ramp” closes the check ball in the lifter, and the timing on the four MDS exhaust lobes was advanced by a few degrees.
Do you need to flash the PCM for MDS?
Click to expand… The PCM needs to be flashed to remove the MDS solenoids from the programming, otherwise, you will get codes related to MDS faults. The advantage is that IF you ever change out your cam, you don’t have to worry about finding one that is compatible with MDS.
How to disable the MDS on a Dodge Ram 1500?
This is direct from the chat with the Ram Hemi Engineers. To disable the MDS, put your shifter from D to 5 (as displayed on the EVIC or cluster). With the console shifter, this is just one hit to the left. With the column shifter you need to push the +- button – one time. Your trans will still shift up and down automatically through all the gears.
When did GM start using the MDS engine?
The GM truck I drove in ’08 had the MDS and it was completely seamless…you never knew that they had tweeked the engine at all…ever!
How does MDS work on the 5.7 Hemi?
How does MDS work on the 5.7 Hemi? MDS refers to the multi-displacement system. When turned on, this system is supposed to give the driver better gas mileage. The Hemi 5.7 has eight cylinders, but some cylinders must be shut off to improve gas mileage. That’s what the MDS does.
Why does my MDS turn on and off?
MDS Turning On And Off One problem that we’ve seen drivers point out from time to time is that the MDS turns on and off randomly. Generally speaking, this is caused by the 5.7 Hemi multi-displacement solenoid. There are also other symptoms you should watch out for, including hesitation, stall, and shutter.
Is the MDS on on a ram truck?
From factory the setting to show when the truck activates the MDS is off. gixxer likes this. Thanks…..yes it looks like the engine is standard with MDS which is Ram’s cylinder deactivation system. It’ll take some miles before it starts popping up I had close to 1,000 miles on my truck (I was doing 1200 straight through) before I noticed it.
Click to expand… The PCM needs to be flashed to remove the MDS solenoids from the programming, otherwise, you will get codes related to MDS faults. The advantage is that IF you ever change out your cam, you don’t have to worry about finding one that is compatible with MDS.
