Hi all,

I'm a 46 year old mechanic and interested in chiptuning. I'm a total newbie but I want to learn. Reason : a "professional" tuner "tuned" my passat 1.9 AVB 100 HP but I'm not satisfied with it. He promissed 130 HP and on the dyno it only shows 112.
So maybe I'll ask dumb questions but that's the way I've got to learn.
thanks for the understanding and help in advance!