I have a 2001 chevy malibu and it wont start it ran fine the night be for and it wouldnt start in the morning and i replace the fuel filter and the fuel pump humms and i have gas and it starts when u spray gas into the intake and i have no idea wat it can be

When you turn the key to the start position does the starter spin the engine ? The engine cranks no start ! Or nothing happens when you the key to start position ? no crank no start ? Is the anti-theft light lit on the instrument cluster (SECURITY) ? If the starter spins the engine does spin slow or normally ? Is there spark , fuel pressure ? Testing these thing's would be the place to start if the engine spins ! Videos on youtube showing how !

fuel issue? check all fuses first then check your fuel pump filter. disconnect the power cable from battery for 30 min then plug back up and try that should fix it based off the info you just gave

see if you can hear the fuel pump come on..if it dont bang on the bottom of the fuel tank..the pump could have ran dry and got stuck

FAULTY COOLANT TEMPERATURE SENSOR OR IDLE AIR CONTROL VALVE MALFUNCTION.BEST TO GET CAR CODE SCAN THAT WILL SAVE TIME MONEY AND GUESSING.

replace fuel filter has water in it freezeing up at night im thinking(and cheap place to start)

Try tapping on your PCM behind your glove box,also are you getting fuel pressure and a good blue spark at the plugs when cranking the engine?

there is a a/c relay in under hood fuse bx, check this it may be bad. check micro relay it is # 16, it is for the a/c compressor. in fuse box under hood.

Lets do the basics. A engine has to have compression, fuel and spark to start. Sounds like one may be missing.

sounds like an antitheft system malfunction - check to see if light stays on after you remove the key

if it dont have good compression it will not start check the comp and make sure there no water in oil if fuel pressure is low it will not pop the injector open try some starting fluid