I'd appreciate anybody's advice. My 1995 GTI "hesitates" under acceleration, especially between 1500 - 2500 rpm. I have cleaned out the throttle housing, replaced the coil & plugs, replaced the fuel filter and had the factory settings restored by a VW dealership. Unfortunately, their involvement cost me a fortune and did nothing more than reveal the fact that their ability to troubleshoot ends at the readout from the diagnostic computer. Any ideas ?