I have a 07 600 . when its at idol even after warm up the idol surges. off the line its boggy and theres no power , at about 4000 rpm the power kicks in and theres plenty . but the surging continues causing slight irregularity in acceleration and and throttle control during cornering . throttle body balanced and i ran some injector cleaner i got from the shop no help . i was told to do a remapping is that a good recommendation, what do you guys think is my problem ?