Will start but it won't stay on once I step on the

it appears you have electronic throttle control. any applicable trouble codes, relating to that system? clean the throttle bore and around throttle plate, don't force the throttle plate. your idle air is electronically controlled.

That could be a number of things, clogged fuel filter, faulty ignition coil, battery voltage low due to old faulty battery/bad alternator. Recommend finding a reputable mechanic that will properly diagnose the problem.

its possible u may have burnt out the pump it uses the fuel to cool the pump

first i would look for a vacuum leaks get it as close to idle as you can when cold and spray carb cleaner around and also check to see if the egr valve is stuck open this will act as a vacuum leak but not detect as one spraying carb cleaner around carb cleaner with change the engine speed near a vacuum leak

It sounds to me like it is not getting any fuel. Please note that when you step on the accelerator, you are not stepping on the "gas", you are really stepping on the "air". If the engine stalls when you do this, it is most likely because there is not enough fuel to go with the air that you are giving it. There are many things that could possibly cause this, ranging from a defective fuel pump assembly to a bad Mass Air Flow (MAF) sensor as well as several other things.

I would recommend BEGINNING diagnosis of the problem by scanning your engine control computer for possible Diagnostic Test Codes (DTCs) A.K.A. "fault codes". Then you may want to follow with a fuel pressure test (depending on whether there are any DTCs present that must be fixed first.)

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.

change fuel filter- add fuel injector cleaner to tank- drive for a while- if no improvement possibly a plugged catalytic converter

Flush out gas tank. Dirt.

Clean all three battery connectors and replace bolts