I have just recently bought a 2007 Ram Big Horn with the 5.7 hemi. I have put on the K&N Cold Air Intake Kit and a Magna Flow Cat-Back Dual exhaust. When I am driving at a low speed (up to 50 mph) and at low rpm (1500 or less) the engine almost sounds like it is lugging (missing). When I step on the gas it smooths out and runs and sounds great. It is the MDS engine so I was thinking it may be kicking down to four cylinders and that is what is changing the sound. If anyone else has run into this I could use the knowledge of what is going on. Thanks

 

I own a pre-MDS Hemi, so I have no first hand experience, but there are quite a number of posts on this and other forums that I have read where a large number of people with MDS trucks experience what you are describing. So I would say that your assessment is correct.

 

Thanks! Nice ride.

 

No worries. Just the MDS working as it should. Have Fun!! Nice truck BTW.

 

this may be a dumb question but is there a programer that can be used to turn of the MDS?

 

off** sorry

 

Try this link:

https://dodgeforum.com/searchpro.asp...bmitbutton=+OK+

 

any real opinions?

 

I guess you are really lazy, that you can even read the posts in the link to get people's real opinions and solutions to your dumbass question. No offense.