Car wont start, and i have change starter ,fuel pump rely what else do i need to do

Hello, Cranking and not starting can be due to a fuel system issue, but there are other causes for this concern as well. For the fuel system, listen for the fuel pump, listen to see if you hear it when you either open the driver door, or turn the key to ON (or push the start button once). If you do not hear it running, you should start by checking the fuse, and testing with a multi-meter at the fuel pump to determine if it is actually being powered when it is time to prime the system. Other causes can be electronic issues, a low charge on the battery, security issues, vacuum leaks, and many more. If there is nothing you notice causing the vehicle not to start, I recommend seeking professional assistance.