2001 grand marquis mercury LS

That happened to me. it was the fuel pump, $750 to replace. First, though, replace both fuel pump relays, both under the hood, cheap and easy to get. Mine were bad, also. See if there's any fuel pressure with a pressure gauge (auto store). Check the inertial cutoff switch in the trunk, to make sure it's not "popped" Ooops, you said nothing but a click. Probably not fuel, could be battery, corroded battery terminals. Also, a bad stop light switch, or broken wire can do it. Can you get it out of neutral when you hit the brakes?

Yeah i can get it out of neutral and press on the brake and where is the inertial terminals located in the trunk

It's under the upholstery on the left side of the trunk. There's a red button that pops up, when it's disabled. The car doesn't turn over? i still think it's the battery cables. If it turns over, it's the fuel pump. you just hear a click? maybe the starter is bad, or starter relay.. If you turn on the lights, turn the key, do the lights go out?

The button is push in already when I open the trunk how do I push it back out no the light doesn't go out

Where's the starter relay

If the button is pushed in, you're good to go. Pump is enabled. It only pops out in a car crash or bump. Clean those battery cables!

Starter relay, from car gurus Right side of engine or passenger side, down low, best to lift the vehicle and access it from underneath.

Pcv valve will cause also to just click sometimes or crank yet no fire