If U remove the covers behind the air box at the top seam of the drivers side fender you,ll find a T piece with a one way valve and sieve that gets blocked...
Give it a good clen and rather suck the gunk out of the one pipe....if necessary..... That sounds Gross.....
But I find it works better than blowing in the pipe.
__________________
" Love the Sound of a V8....... All Day " *still wish it was a V10*
2002 S8 D2 F/L
H & R Springs, Koni Coil Overs, Dastek Chip, Sport Exhaust, 19" S5 Rims, Solar Sun Roof (Cause we have Sun) and most of the Bells & Whistles.