Originally Posted by stever
I just had a magna flow muffler installed on my ram 09 hemi ,but I have a problem according to my evic system my fuel economy just went in the gutter,it is about 3 to 4 miles to the (bad) on highway and city driving .I talked to my dodge dealer and they seem to think that the MDS system does not like the change and it is staying in the 8 cylinder mode..?
tell your dealer he's full of s mufler has nothing to do with it . quite a few of the mds 5.7s have this trouble , trouble is in the damn mdf sys . not working right . but you cant tell the damn dealer that they know everything . same thing happened when they came out with the 4 8 cad,s a few years back . mdf systems suck then and now .