1. Fuel Pump: A failing fuel pump can cause intermittent starting issues. When the fuel pump is weak, it may not be able to deliver enough fuel to the engine, causing it to stall or not start at all.
2. Fuel Pressure Regulator: A faulty fuel pressure regulator can also cause starting problems. If the fuel pressure is too low, the engine will not receive enough fuel to start or run properly.
3. Ignition Switch: A worn-out ignition switch can cause intermittent starting issues. When the ignition switch is faulty, it may not be able to complete the circuit that allows power to flow to the starter.
4. Spark Plugs and/or Wires: Worn-out spark plugs and/or spark plug wires can also cause starting problems. If the spark plugs are not firing properly, the engine will not be able to start.
5. Battery Cables: Loose or corroded battery cables can also prevent your car from starting. Make sure that the battery cables are securely tightened and free from corrosion.
6. Bad Starter: If you've already replaced your starter it may be possible you installed a faulty one. Try replacing the starter again and see if the problem goes away.
7. Computer Problems: If there are electrical issues with your car’s computer, this can cause starting issues as well. Check to make sure that all the electrical connections to your car’s computer are secure and that your car’s computer is not damaged in some way.