ZPow

Hi guys I have a problem that's is driving me crazy! my car sometimes start well another times just cranks and after an hour starts, I have changed cam sensors and crankshaft sensors (from dealer), I also change the clutch switch. This problem began after the turbo install in my car (I donīt know if it cares), I already read many threads of this problem as well seen videos about this symptoms but I just can't solve it. I have notice that if the car is hot let's say drive it around 30-45 minutes and turn off the car and then after 10 minutes try to start, it just cranks. Also another thing that happened yesterday, this problem came back and it just cranks, so I read the codes an throws P1615 that is a problem related with NATS, clean the code, wait about 10 minutes and then start, I have checked codes in another occasions when this happened and the codes that I have (since 2 moths ago) are P1136 and P0037 and the code P1615 appered yesterday, today I turned on the car the with no problems, help!