I just got off the phone with a dyno tune shop and the guy told me that I need to change two things before I considered getting my car back on the dyno. The Stater which I know what that is. But the other he called the Modulator I think. He said that it was on the fender well and probably needed to be replaced. Does anyone know what I am talking about? Any pics or info or where I could get one would help me out alot. Is that what it is called a Modulator ? I don't know please help my stupidness