Yep, and it didn't make it any easier when the tuner didn't talk while he was tuning for the first half hour. Just kept running it and focused on the readings. I was just thinking "Is that good or bad?" Then we started talking as he got a little closer to the final tune. Put me more at ease then. Just be up front with what you are looking for and call or email them for advice weeks in advance. I ended up gapping my plugs a little wider than he preferred, because I waited til 2 days before, but it all worked out. Car feels waaayyy better now and runs much better too.