I recently got a 2000 WS-6 TA M6 and I am having a slight problem. When I am starting from a dead stop I get some chatter, which make me think that it is the clutch, but the clutch is smooth with everything else and doesn't chatter when going from a dead stop in reverse. Also the only mod on her right now is a LS6 intake and the check engine light is on which is making me think there is some sort of misfire because it wasn't properly tuned when installed (was on there when I bought it) so would this create a shudder from a dead stop in low rpm's? Any help?