hey guys, new to the forum. i have a issue i need help with. i have an 2014 iron 883 w/ short shots, big sucker intake, and a power commander 5. i had the harley dealer here install and dyno tune the bike, and since then I've taken it back 3 times to try to get it right, but it still spits, sputters, hiccups, and hesitates on initial throttle when revving. they are now blaming it on the power commander, but I'm starting to think they don't know how to tune it. anyone else have this problem?