guibo, or flex disk is bad. PM proliphic, he knows all about these worries.
could be your fuel filter or your fuel pump. You sure its not the coils/plugs?
edit: as far as i know, fuel filter could cause a similar problem, but not this serious from what i know
Hot: 2001 Estoril M Roadster
ZCP 19's, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt
ZCP 19's supersports, ZHP knob, UUC short shift GROM, OEM 18's w310's,
http://absolutehid.ca hid kit