My buddy has a 12 pro with a 2013 update on the top end with a intercooled boondocker turbo and it would bog at low rpm's but if we eased into the the throttle and got to higher rpm's it would run smoother but can't figure out the fuel mapping cruising through powder field and almost put him over the handle bars said it felt like a bulldozer going through the snow any suggestions or answers to our problem? Thanks.