Heres the story. The car is a b5 99 manual 1.8T with 195K Km, chipped with APR, K&N cone filter and the 710N DV. I have noticed in the past couple of weeks that the car doesnt accelarate the way it used to. In the past 2 month i have changed the timing belt, fuel filter and the spark plugs. Also my catalytic converter broke about a month ago and my mechanic was able to weld it back with no problem. I Cant seem to figure out what is wrong with the car. It feels super slow. My sisters freakin 92 accord is faster than mine. anyways i changed the vaccum lines also so i doubt there's any leak. somebody from passat world recommended i go try a b5 at the dealer and see how it feels compare to mine. So i finally found one yesterday and Omg whata huge difference. Stock b5 ran better than my chipped B5. My luck i received the boost gauge that i ordered yesterday and installed it this morning. With the chip i get about 18-21 in vac when in neutral. The maximum boost that i got was barely 9lb. so i figured maybe the chip is faulty and i put back my oem ecu. Got the same vac numbers but the max boost was like 6lbs. so now im lost completely and dont know what to look at anymore. Could my cat be blocked or something? how much of a difference will it make? I need advice guys.