Why doesn't my car start it just turns over

2006 cobalt. It started then it didn't start. It
turns over but that's what it does. It's not the
timing or fuel pump I ran a code check and no
codes show up. The motor is in mint condition
only 79000 on it I put brand new battery it's
working perfect. No lights flashing no water in
the oil or antifreeze in it. I don't get this car can
someone point me in the direction of
something wrong .