A4 TDI 130 SE 20001 73000M

Hello again guy, I am sick to death of cars breaking.

I drove home from work this evening, My car was fine.
After a hard weeks graft I ordered my friday night curry from the take away and headed down to pick it up , Start my car , 1st gears fine, 2nd gear 1200-1600 no power at all , get to 2000 all power returns and car boots it up to speed, I decided to take it for a drive down the local bypass , its fine at high speed , it only seems to occur at low revs, 1200- 2000 rpm is , just nothing happens , I put my foot down and I go knowhere, 3-6 second delay after applying right foot.

Filled up half a tank of shell vpower 3 days before problem started.

HELP.....

** NOTE .u may have noticed I posted another problem last week, this was a friends car ***