i have a 98 323is maunal with 60k. No matter what gear i am in , between 1800 and 2900 rpm i feel a hesitation in the car. i just had a inspection II tune up by a ceritified bmw mech. and he said there was no problem, but i still feel it. My girlfriend has a 96 325 and i don't feel the problem in her car. Anybody know what could cause that?