Quote:
Originally Posted by DBO
^I've done the same thing, although it doesn't really change the sound profile. Have you guys noticed that on startup the car seems a lot throatier and louder before it settles back down to being almost silent? There must be something active in the exhaust system somewhere to cause that but I haven't found it yet. There's no other physical linkages in the rear silencer so I could either be something internal (i.e. passive) or further upstream.
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It's a warm up phase mode to quickly heat up the catalytic converter, there is no physical change but it's a software in the DME.