Hi All,
Changed the ECU today,now got an Aero ECU without VSS.Immobiliser now disabled and car runs fine with a little more power too.However,I still have the intermittent fault with ignition,still all goes out on dash etc for a second then back on again.Turn the key,wont start,only oil and battery lights visible.Put a new battery on tonight,still the fault.Getting to the end of my tether now,my only hope is the auto electrician in the morning.
It looks inevitable that I will have to get a second mortgage to get the guys at Saab to plug the TECH II in.

Woe is me.......