I have a 2000 Nissan maxima that won't start it's getting gas and fire but when I spray started fuld it will start up

You need four things to start and run and engine.

1. Fuel
2. Air
3. Spark
4. Compression

If it will start with starting fluid, then you have 2, 3, and 4. Even though you may have fuel pressure to the rail, up to the injectors, if they aren't firing (which seems to be the case here), then you have no fuel in reality. You need to investigate why there appears to be no injector pulse(s). The computer obviously have all the data it needs since it is supplying spark. Often, anti-theft/immobilizer systems will use the fuel cutoff method to disable the vehicle. It may be one path to look at.

if someone put sugar in gas tank and you havent tried to start it then your OK you just need to drop your gas tank and flush it out . If you tried to start it and it got to your engine then you have a major problem like getting a new engine

is security light on? do you have correct key programmed for security? if security light is solid and not blinking when starting, you will have to get towed to dealer for reprogramming...

Now that a mechanic, I assume tested your car & told
you what was needed,why are you here?

spray aero start into the intake as someone is cranking the motor. If it runs on aero start it is a fuel delivery / pressure problem

could be as simplet as blown fuse for radio. i would start there. look at your "audio" fuse in the fuse box. if thats ok, then you have something elses goin on, but start with fuse check.

sounds like it might be flooded. Try and remove the fuel pump fuse from the fuse block that is just in front of your left knee. While it is out crank the car and see if it wants to start and hold down the gas pedal all the way and then relase it and back and forth and once you get it to run have the fuse ready in your hand and in front of the spot to install it. and then keep the rpm's up with the gas pedal until the smoke clears out behind the car.

Check your fluid level

Check if the spark plugs fire,probably that why it is starting,you need to check that before.

Try spraying an aerosol oil around the intake manifold and around any vacuum lines and connections with the engine running. If you hear a change in the engine speed than you've got a vacuum leak. Thank you, Dana