My summit 670X is not running right! This weekend i went out with my sled and everything was running fine, until about that last hour. It rev's up really high, and idle's really low. it bog's down. I recently put a can on it, and i lost the silicone seal on it this weekend as well. i have sealed it up again, but have not tried the sled again. i was wondering if that might have had something to do with it. not the right compression or something? just wondering if anyone had any other ideas, or had heard of this problem before.