I've done endless installs on 34's with e-manage...did you buy the add-on to stop the check engine light from signalling when you install the ignition harness? Also did they place diodes in the igniton lead to limit the trigger voltages?
http://www.skylinesaustralia.com/forums/in...868&hl=e-manage
This show's my old e-manage blue, with a field car specific harness...the little black box is what you need to prevent errors with ignition, you can't make out the diodes on the other section.