I have a 99 A4 with an AEB, just put a k04 in, custom exhaust, GIAC chip (with out pc16 upgrade) and a adjustible fuel presure regulator.

On my way to work this morning the car died, dont really know why, have not had time to really check things out its at the shop.. My question is can the stock Fuel pump handle a regulator set to 5 bars, and is it posible for the regulator to fail? feels its not getting any fuel.. and the tank is half full so i ddidnt run out of gas..