Msd
 

I have a digital 6al MSD box and I've noticed on the first initial start it just cranks. Once I switch the key all the way off and start again it fires right up. After the car gets to operating tempt and the fans come one when you shut the car off it doesn't start again. I've replaced the ignition switch , sending unit, the while distributor, new msd box , solenoid, started, and even went through the wires to make sure nothing was frayed or burnt and still having the same issue. Even replace on the fuses. Could the msd harness need to be replaced? Its been in the car for about 7 seven years. Opinions please.