Well, scan your commanded timing, and tell us AFR... we cant suggest anything without this information..
If your maf is reading the same amount of air while giving you a good airfuel ratio output... and you make the same timing... there is nothing wrong with your tune.
Too many people are on the "you have to get it tuned" bandwagon on this forum... and as a tuner of almost 7 years now, I can say that mailorder tunes are much better than people think they are (hell factory stock tunes are pretty awesome on most things as well).
