there a difference between a tuner and a mechanic. Some people are on tight schedules and dont have time for troubleshooting someones car for 4 hours while sitting on the dyno with the rates clocking up per hour or and last i checked most shop owners dont like you using up there much needed garage space on something there not gonna profit on. people need to understand when they bring there car to get tuned...ESPECIALLY dyno tuned that there should be no known issues. never just think "oh im sure my tuner will figure it out when i get there" it just doesnt work that way, unless other arrangements are made of course and the tuner is aware of this.