Ok so here is the deal, i have a 04 a4 quattro with the 1.8t. My check engine light came on and when it did i realized that i couldnt feel any boost pressure anymore nor can i hear the turbo spool. I have a GIAC tune on the car and an intake and i have read that with a tune on the car it could make the oem diverter valve fail. could this be the problem? i plan on having the code read to see what it says and to make sure. Also since this has happened when i press the gas peddle down ll the way to the floor it sticks and i have to wedge my toe underneeth it and pop it back up. I believe if im correct that it is because i am feeling less power and think that i have to pres the peddle down further. Any help or hints and tips would be greatly apreciated. If it is the diverter valve then i plan on getiing an Atftermarket one that will suport higher performance. any sugestions on that also?