View Full Version : Knock

06-01-2010, 04:49 PM
I picked up my 2004 ps190 tt this weekend, we took it out skiing sunday and i noticed sometimes when i start it, it makes a denation soud just as it fires up,something like a car would when you shut it down if it was hot or something, I know we all heard this sound at some point in your driving carear, was using high octane fuel and didn't seam to be hot, maybe un atomized fuel in one bank or something? its the mcx 350.

06-01-2010, 06:01 PM
I get that on my '08 X2, but it turned out to be the exhaust flappers. Sounds horrible & doesnt always do it. Hopefully that is you problem and not a true knock.