Hi All i was at the GTI International yesterday were i was possesed by something and accepted the APR guys offer to remap my A3 2.0 TDI noticed the power after about half hour and when i got bk to leeds i parked up happy. later that evening i started my car was ok, as i pulled of a massive cloud of grey spoke came out of my exhaust and kept doing it when i was setting of from standstill. i parked up revd the car up nothing. as i am in traffic or lights pulling away i get the spoke or in second then i excellorate hard. can anyone help.