Obd II is just easier to reverse engineer because it HAS to do certain things to be OBDII compliant. BMW releases nothing about their EFI systems. Same as Porsche. Most people find it easier to Motec a 911 than screw with porsche's stock ECU. Dave __________________ Dave - PDX 1995 318ti - Active Black and Tan. 2005 330xi - Mtech 1 - 6spd - Orient Blue/Black |