The MDS system in the 5.7 Hemi engines is designed to improve fuel economy by shutting off cylinders when they are not needed. There are several ways to tell if your engine has MDS. One way is to look for the MDS light on the dash, which should come on when the system is active.
Another way is to listen for a change in engine sound when the system is active – it will sound like one or more cylinders are missing. Finally, you can feel for a change in engine vibration when the system is active.
The MDS system in a 5.7 Hemi engine is designed to improve fuel economy by deactivating four of the eight cylinders when they are not needed. This allows the engine to run on only half of its cylinders during certain driving conditions, such as cruising on the highway. The MDS system is active at speeds between 9 and 25 mph (14 and 40 km/h).
You can tell if your 5.7 Hemi engine has MDS because it will have a cylinder deactivation light on the dash. This light will come on when the system is active, and it will go off when all eight cylinders are firing.
How Do I Know If My Challenger Has Mds
If your Dodge Challenger has the MDS system, it will have an “MDS” light on the dash. This light will come on when the system is active and working to save fuel. If this light is not on, then your Challenger does not have MDS.
Credit: www.amazon.com
What Year 5.7 Hemi Has Mds?
The 5.7 Hemi engine with MDS was first introduced in the 2005 model year of the Chrysler 300C. This engine is also used in the Dodge Charger, Challenger, and Magnum. The MDS system stands for Multi-Displacement System and it allows the engine to run on four cylinders when full power is not needed, such as during highway cruising.
This helps to improve fuel economy.
What Cylinders are Mds on a 5.7 Hemi?
The cylinder deactivation system on the 5.7 Hemi is called MDS, or Multi-Displacement System. This system can deactivate up to four cylinders at one time, depending on driving conditions. When activated, the MDS system can improve fuel economy by up to 20%.
Which Dodge Engines Have Mds?
The MDS system was first introduced on the 5.7L Hemi V8 in 2008. It was then expanded to the 6.4L Hemi V8 for 2009 and has been used on various other Chrysler Group engines since then. The main goal of the MDS system is to improve fuel economy by shutting off cylinders when they’re not needed.
So, which Dodge engines have MDS? Well, all versions of the following engines have MDS:
-3.6L Pentastar V6
-5.7L Hemi V8 (2008 and newer)
-6.4L Hemi V8 (2009 and newer)
What Year Did Ram Get Mds?
RAM introduced MDS technology in 2003 in its RAM 1500 truck. The MDS system improves fuel economy by shutting off half of the engine’s cylinders when they’re not needed. The system is designed to operate seamlessly, so drivers shouldn’t notice any difference in performance.
What is MDS? Multiple Displacement System: How to Disable MDS Temporarily
Conclusion
If you’re not sure whether or not your 5.7 Hemi has MDS, there are a few things you can check for. First, see if your vehicle has the required cylinder deactivation system. Next, check the oil level and quality to see if it’s been degraded by MDS.
Finally, take your vehicle for a test drive and listen for any unusual engine noises. If you notice any of these things, it’s likely that your 5.7 Hemi does have MDS.
