Did you verify if the fuel shut-off solenoid on the IP is working? Could be as simple as a bad wire or failed relay.
2012 Platinum S-line A3 DSG- bought back by VW
2000 Golf 5spd, 301k, the usual mods, sits forlornly in the backyard.
2006 Jetta DSG- gone
2015 GHB SEL 1.8 tsi