my 05 audi a6 3.2 will sometimes die and not start back, sometimes runs just fine. i changed the fuel pump and that didnt solve the problem. i am getting these codes as well...

1) p0455, evap emissions , control system leak (large)
2) P2101 TAC MOTOR CKT RANGE/ PERF
3) P2006 intake manifold runner stuck closed control bank 1
4) p2007 intake manifold runner stuck closed control bank 2
6) p2404 evap system lk detect pump sensor circuit range/perf

I was getting the evap codes before i changed the fuel pump because i had a fuel leak from around the seal at the pump and havent cleared the code yet so it may be fixed now. any help would be very much appreciated. thanx!