Why won't my car start but will crank in a 2007 madza 6

Hello, check for fuel pressure and delivery to the engine and ignition spark to start with. Air intake (too much or lack of) can cause running problems, but i'm thinking it's fuel or spark at this point. Engine compression and timing of course can be a cause as well. Find out what is missing and proceed with troubleshooting in that area; or obtain assistance from a local skilled technician near you.