The pre-screen is a pre-filter filtration 'thing' located in the airbox assembly, down and in the front portion of the airbox. You'll need to remove the top of the airbox, pull the filter, remove two Phillips screws, and pull it (the screen) out. I'm not sure if the hesitation is gone yet, but I'll post when I know. -ENS D.J. Bergesen Student Naval Aviator djbergesen@dotstar.net 96 Jetta GLX VR6 "V WAFFE"