Cranks no start please help!

Hi,
I bought a 2008 Mazda CX-7 from an auction place, the car cranks but does not start, I replaced the four spark plugs and it still won’t start. I plugged in an obd reader and scanned it for codes and no codes was coming up. Can someone please advise me on what the issue is? I checked the fuses and all are intact. I can hear the fuel pump run whenever I turn the ignition and the car came with no keys so I had to have a key made by a locksmith who programmed it afterwards.

 

There are many reasons possibly. I would do a compression test will tell you a lot.

 

Is there gas in it. Did you confirm that gas is getting to the engine? Look under the hood for anything that is unplugged

 

Have you actually checked spark yet? There's also a few grounds in the engine bay, one near the hpfp that's troublesome, another on the pmm, then on the tranny and one on the battery make sure they've got good contact and are snug

 

Post the Vin for me.