Had a local speed shop delete the MDS out of my ECM / computer and it made all the difference in how the truck performs. Runs much better and the fuel mileage is better 14 in town and 22 on the highway with the 5.7 motor. The one thing it did affect is how the transmission shafts it has made it a little more of a positive shaft not bad but you will notice it.

 

22 is really good. I've been averaging 15.5 mixed since I turned off the MDS. Of course I do live out in the country and a lot of my warm up time is on back twisty roads so I'm sure that doesn't help. Glad you got that working for you.

 

Just tuned my 08 with the Diablo i3 and turned off the MDS…
Night & day difference… Very pleased..

 

Will AlphaOBD disable the MSD?

 

I'm going to leave that one to someone who knows AlphaOBD. I've never used it. I use a Diablo Intune i2.