Hi all. Wondering if i can get some advise i have got an audi a4 1.9tdi (90) got it remmaped at jabba sport about 4 weeks ago and before i took it to jabba sport i had my maf sensor replaced. after the car was chipped the car was much more responsive now some times the car accelorates perfectly and some times in 2-3rd gear at 2000-3000rpm the car goes really struggles. Took the car to my mechanic he is not sure what it could be when revving the engine you cannot relly hear the turbo either. just wondering what the problem could be because the maf sensor is new. Could it be the pipes like the other problems other audi owners had or the n75 or egr. HELP!!!!! Please!!!! Thanx!!!!!