garage phoned me to say car now starts. reason loose number 11 fuse in fusebox supplies engine management. when i tested briefly,'on the day' i still maintain i measured both coil and injector pulses (perhaps i should have current ramped the injector pulse) Also, 1)on one coil wire you see a 5v reference 2)on another an earth 3)on another a 'square wave' signal 4)i still need to find out what we should see on the fourth wire regards john sartain