If the cam sensor (not affected by crankwalk, thats the crank angle sensor), or the crank sensor was bad, you wouldnt get spark. If the engine doesnt know where the motor is relative to top dead center it wont fire the injectors or plugs. If you are getting spark its time to look elsewhere. Start with the fuel pump. Have your mechanic (not that first guy
) check to be sure its working by whatever means necessary. using the scan tool to force it on while the key is in the on position but the car is not cranking is the best way. Anther simple test is a compression test. If the motor doesnt have compression for whatever reason it wont start. But again, since it ran when you shut it off this is very unlikely. Just by the fact that yo have spark I can rule out several other possibilities, so be sure that you are getting it. If yuo arent getting it you need to look into the ECU, the ECU fuse, coil packs, ignitor, etc. Make sure you post when you find out what it is