Do you hear loud jet engine sound when you start your car? If you do the pump is on its way out. If you have a vag com you turn the pump on and open the solenoid that opens the valve. Also go with the ngk plugs like the guy in the other thread suggested, I had the stock bosch ones in there and my car ran like shit, I had denso iridiums in there, it ran good for a while but then in 4th and 5th gear full throttle it would feel like it miss fired and everytime i tried to floor it would keep doing it, finally I put in the ngk bkr6e and it runs like a dream, it feels like i got all my lost power back.