Skyline r32 spark question
 

I need help, i've done research and cant find anything that helps. I have a 1990 skyline gtr which is having issues starting. When you try and start the engine with the key, the engine gets no spark to any cylinder and just cranks over. When you pull the crank/cam sensor off (and leave key in "on" position) and manually turn it, all cylinders get spark. I've tried it with 2 separate CAS

What would cause this? I've replaced, igniter pack, CAS senson, and spark plugs

Thanks

Check to make sure the Alignment dowel on the camshaft for the cas has not boken off

keys are not broken. If you manually turn the CAS and get spark and put it back in place sometimes it will start. After it starts and let it run for 20-30 mins and turn off car will start right back up. But if it sits for 15mins or so it wont start and same problem all over again