SUV will start but shuts off quickly after starting

So I have SUV listed above Eddie Bauer edition 5.4L v8 Triton engine. My SUV was working just fine until my buddy (who was intoxicated) thought it was a good idea to look under my hood and twisted off my engine oil cap and accidentally dropped it in the engine/hood. then shortly after his phone. Anyways,. found both items after like an hour trying to find them. Then he opened up the air filter to check it and couldn't seem to put it back in or locked on the right way so it is not completely air tight. Is it possible that could be the problem or would none of that matter? He swears it has a bad fuel pump but i am thinking it could possibly be not having any engine oil in it now. But like i said it was fine until he started messing with it and now it will start but turns off quickly after starting. Please any ideas or advice would help.