Here's a curly one for you guys. 1994 300ZX Twin Turbo with electric Hicas. Has an earlier 90-93 engine and ecu installed with nistune. When I connect up the ecu talk cable and go into NISTUNE it recognises the ecu and shows all parameters for the car. When I try to go into CONZULT it doesn't recognise the ecu. If I then get a stock ecu and connect it up, CONZULT will then recognise the ecu. Has anyone experience this particular issue before and have a solution? Second part of the problem is that the hicas light is on from the get go on start up and heavy steering. Dash has an indiglo face but I don't believe the dash is dodgy as no jumping around at all, I suspect speed sensor is good but haven't tested it as yet, again no jumping dash which generally points to it being ok. Can an early ecu "talk to" and is "compatible" with the later model hicas system? I really want to hook into conzult to test but things are not playing the game.