starts & runs some times shuts off, restart & will run again

Hello, You will need to have your fuel system diagnosed. There is a chance that this issue is related to the ignition system (spark plugs, coils, etc..), but likely you are having an issue with the fuel pump, filter, leaks, or even the throttle position sensor. If you start changing these without diagnosing the vehicle, you may find that none of these solutions work. This is why diagnostics is vital to proper, effective repair.