I have a question...added it to the ECM download thread...but no answers. Hoping this will get answered.
I had this done a few days ago (newer ECM download update) and I could swear the engine sounded different. Exhaust sounds louder, lower, throaty. Is that my imagination? I swear it sounds different.
The putt-putt at idle seems more pronounced, too. This is the best I can describe having this new code put in our 2011. Kind of driving me nuts thinking like this without a knowledgeable person stepping in with some real thoughts on the matter. I'm a noob, but I suppose it could sound different since that ECM thing is controlling air/fuel/exhaust mixture, right?