Hey guys I'm brand new to the forum and need a little help. I just purchased my 2005 r6 about a week ago bare bones stock with 9000 miles on it. When I got it I rode it a little for a few days and it drove just fine. I then changed the oil, flushed the coolant and replaced it, and put a slip on exhaust on. Just in the past couple of days it has been doing some weird stuff. When I first turn it on (whether it be first ride in the morning, or after driving to school and turning it on again after a few hours of class) it idles extremely low like it is about to turn off. Today it even idled real low and shut off on me after just a 2-3 seconds. If I gas it while turning it on the idle goes up to 1500 rpm fine. ALSO, the idle is jumping around from about 1700- 1500 back and forth like a rhythm when just idling. Isn't it supposed to be a nice constant sound?? Another thing is I clocked the mpg from a full fill up and got just about 80 miles to the full tank (around 3.2 gallons) seems a little low?? Another thing is that in 1st gear from a stop it seems sluggish with constant building throttle and then comes to life a little more at about 5000 rpm, is that normal? I have been trying to figure out the problem, and don't know whether to start with changing the spark plugs, cleaning the TPS sensor, or what! Please help! I appreciate any info!