I have an '06 GT with roughly 3000 miles on it. I had no problems for the first 9 months, but there is now a "hang" between shifts. The rpm's go up slightly when I push in the clutch and the car sometimes seems to pull itself when I let off of the gas. The performance is fine but the jump in rpm's is really annoying. I've been told it is probably related to emissions. Any ideas? Would a tuner help?