So I just picked my car up after having LT's and the cutout installed, sounds real good and theres a noticeable power difference but I have a couple problems. First being when I slow to a stop I notice a vibration toward the back of the car, like maybe the exhaust is hitting it. The car also seems to be running a little rich now (blows some black smoke under heavy acceleration) I know it needs a tune, buuuut I don't know anybody in the area to tune it. What are my options here??