I own a 92 3000gt SL and it likes to only start when it wants to. When it does start it drives completley normal but sometimes it will just sit there and turn over as she usually would. then 30 minutes to and hour and a half or so i try again and she starts up 90% of the time. Very sporatic and i was curious if anyone new what this could be? ignition module, crank angle sensor or cam angle sensor, or ignition coils or plugs and wires are my suspecrts so far? please help thank you

Purely a guess but it sounds like the crank position sensor. I would check the stealth / 3000gt forums. good luck

Turns over but does not start or turn the key and nothing happens? If the later the diodes in your ecu are probably leaking. Or possibly the ignition switch or neutral safety switch is about to go out. These cars are known for these issues.

what dandyoun said,,, it sounds like the ignition switch or relay to me too,,, do you have any check engine lights though ? pretty sure its the switch or relay but if you have any CELs then you should get it scanned which you have to do yourself but its easy as can be