I have a 99 GTi with about 50 hours. It is not getting enough water to the propulsion system. Acts like its got weeds in the intake but its clear from the outside. you can tell the RPMS are coming up too fast... top speed 40 when it should be 55. I'd like to take the intake grill off and feel up there and see if something is up inside. Got the manual but can't find how to drop the grate. Can I just take the forward screws off and drop it? thanks