06 cadillac cts, no codes. Crank no start. No spark. The computer maybe?

What is your question?

New starter. It turns. Checked all cables no broken or damaged cablea. New crank case sensor. Checked fuel pressure 41psi. No spark. Engine does crank. I checked spark plugs and coil packs all good. This problem comes and goes.it happens when i let the car sit for a day or two then it fixes it self. I dont know at this point the computer at fault. No alarms coming up or check light codes. No hasitation on the engine when it works.

What makes this problem better or worse?

Letting the car sit makes it beter

How long has your 2006 Cadillac CTS had this problem?

A month