To make a long story short couple buddies took my 2007 gti out hit a bank pretty good and back off and I guess things seemed to be fine. They slowly took off to make sure everything was running ok and once they hit 4,000 rpms or so it started bogging down to the point now where it wont even idle. Sounds like it's having trouble getting air through. I had the house hooked up to it and the impellar runs great and accelerates when I hit the accelerator. Just when you get the doo in the water it sits. I have no clue what may be wrong there is no physical damage or anything stuck in the impellar. They did say the overheat alarm came on but I think it's because they keep trying to gas it. I don't know if mud got sucked through because that has happened before and it bogged down but put it in reverse and everything was fine. I would rather avoid taking it in because I know they will over charge and there are only 25 hours on it. Any suggestions or things I could check before I get out the old checkbook.