Stalls while driving

VW Jetta first of the new body style. Had some chances in behavior in the interstate and difficulty starting last winter figured it was the cold but it always turned over and started after a while. Then one day it didn’t and a few guys at work helped me roll start it. Finally it gave up on me while driving and couldn’t get it to start up again. So I replaces the fuel pump as recommended and a fuel line that was leaking everything seemed good also replaced the filter and a few radiator and coolant system leeks that happened before. So with the new pump replaced I started it right up and it ran seemingly fine then I drove it down the road and got out to look for someone and left it running and when I got back it had shut off as of right now I am writing this with it running and it died before I could finish I heard a little click inside the dash before it shut off and it doesn’t want to start again. Seems like I wait and it starts up with a day of waiting. Check engine light has always been on for the crank shaft position sensor and it runs pretty well when it is running. Where do I go from here to diagnose this problem because the pump was simple for me someone with limited mechanical knowledge. Do I need to start trying to get to the injectors or what fuel related sensors do I need to look into. Also I haven’t seen the fans kick on for the radiator in quite a while co it be a sensor tied to that causing it to stall on me?