so I have a crank no start problem and I replaced the ignition switch and ecu that goes with it and changed the fuel pump and my car still does not turn on . it cranks but does not start what else can it be ??

 

battery or starter.

What year is your car and how many miles does it have?

 

You replaced the ignition switch and ECU before checking the battery, starter, and alternator? Any particular reason for that?

If you replaced the ECU did you also get the key that is programmed for that ECU and for that ignition switch? You could be having issues with the immobilizer if you're using the original key to the car. You would need to go to a dealer to have it programmed.

 

or the fuel pump/ PGM FI relay for that matter..