this car appears to have all feeds and earths to ECU, on cranking don't get a live or pulse trigger to coil pack. Auto Diagnos wont read fault codes fails to communicate and live data comes up with question marks where the data should be. Been told this unit cant be tested if its not in run mode. If substitution is an option what do I need to change besides the ECU and the key? is there an immobiliser control unit which stores the code? Any help would be appreciated Thanks. Paul Mc Ewan.