Car dies after 15 minutes of driving and runs ruff

You will need to start with the basics like fuel pressure. If that checks out you could be losing crank signal and a good scanner can help here. Checking actual values while it dies may point you in the right direction and also scan for trouble codes. If you don't work on your own car then use this link to find a good shop near you.https://repairpal.com/repair-shops Alex