i had the similiar problem when i got mine ... first couple of runs when i was breaking it in ... it just wanted to take off! nothing full throttle like otherwise im sure that would have fried my engine. But i just turned my idle screw a turn counter-clockwise at a time. Turning it off then adjusting and then firing it up to see if it helped any .... repeating that pattern. That worked for me well. Also i had the problem that my breaks wouldnt work it seemed and my truck wouldnt stop and that was caused from the metal bar that connects to the acceleration and brake servo .... the metal bar couldnt move back because it was pushed in between the battery box.... so i lifted that bar up and tightened it up by the allen screw by the handle. Worked great after that.

Anyhow anyone that is still reading this long post .... i have a question .... how long to brake pads last cause it seems after that muddy slushy day my brakes arent working very good. Maybe they were just a little muddy but ??? How often does the average guy change his brakes?