Quote Originally Posted by turbo jetta
thanx for the help. i think it has gotten better in the past two days, its not surging that much.
Sometimes it takes a while for the ECU to adjust to changes. Give it a little time.

As far as the N75, from what I have heard changing it out usually creates more problems then benefits.

GIAC usually has very aggressive files. My APR file is VERY smooth, but I dont think it has as much power as it would if I had gone GIAC. Its a tradeoff like Kyle said, a little rougher, but higher numbers.