Car dies after 15 minutes but runns fine before it dies Please Help!!!

[240sxcarbajal]

I have a 92' Nissan 240sx. When I start it in the morning it runns fine without problems, after about 15 minutes it dies and wont start again. I have ran a self diagnosis on the ECU and it gives me code 11 which is the Crank angle position sensor. I have also manually checked to see if i have spark and it doesnt appear to have so. I replaced the Distributor, wires, control module, coil, fuel filter, and timing chains. Can anybody please shed some light on me I have been dealing with this for about a month now.