after tune up, new ypipe, pcv, bugeye startet to run sluggish, gas shut off feel, hesitation on incline or acceleration on 5th gear and boost creep. I did everything possible, from re checking hose, plugs you name it. even mechanic suggest new fuel pump and injectors then a tune(though that's my next step) but low on funds. was getting 20mpg hwy! after reading up on http://forums.nasioc.com/forums/showthread.php?t=1060871 it solved the problem! $8 at napa! runs smooth with no more boost creep or having to ease of throttle for psi to go down! we should have a thread on MAF Cleaning, saves hundreds of $.