hi there i am new to the club been trying to find the right one. i have this pain in the back side problem with my vr when i am driveing the moment i change gear and put my foot on the gas the car feel like its got a flat spot at like 2800-3000 rpm its like the engine is bucking. i have changed the coil pack,air mass meter,leads,spark plugs,fuel filter, and i am now starting to run out of idears i need help if any one may be able to help then thank you for your time....