Jbaker33
Member
I honestly don’t know what to tell you because I’ve never heard of one doing this before. Its written into the programming that anytime tow mode is on, mds is off. The only thing that I can think of is someone already messed with it with a tuner, but even then I didn’t think you could make mds turn on when in tow mode. The hemi tick isn’t related to the mds. Mine has had the hemi tick it’s whole life. Even with amsoil fluid, didn’t make any difference whatsoever.
I'm actually thinking about doing that MDS light diy/hack. That should really clear things up. I don't think I ever noticed it before until I changed the exhaust. It's actually kind of backwoods what I did (No offense to anyone, I'm pretty damn country myself haha). We didn't really nor do we ever have the money to put into my truck like I wish we could (sometimes i have a deathwish and will buy stuff without permission ). Anyways, I decided to take off the rear resonator and see what that sounded like. Not much better than stock, so I took off the stock muffler, leaving from the heads, the 2 cats and one resonator. Well that was a bit much and the wife took my debit card, and also my man card from me so I couldn't get an AM muffler or even straight pipe it. I ended up putting the rear resonator back on to the exhause pipe so now it's the cats and 2 resonators. It does not look pretty under there and after my back is healed from surgery, I'll post a pic so you guys can't point and laugh lol. It actually does sound pretty good when you give her some but isn't obnoxious either. That's when I really started noticing the MDS kicking in and out sporadically, including around 20 mph while accelerating.