help with maxima shut off
 

Hello all,
I posted earlier about this problem . I have been having issues with my maxima shutting off. I pulled codes p1800, p0340 and p0340 p. I changed both camshaft sensors, vais control solenoid valve and the crankshaft position sensor all oe nissan parts. I start the car and turns over strong then after 40secs car just shuts off. No hestitation just shuts off. I immediately start and it does the same thing and the 3rd attempt she cranks strong but wont start. Its been sitting for one hour now and I will try again. The car has 198000 miles 2004 max. Am I missing anything guys? I DO NOT want to take a car this old and so many miles to stealership.
Help me lol,
Blake