Randomly will not start

Security light? The red letters that say theft is solid. According to another response on a page I can't seem to find now it said to listen for fuel pump turning on. I have been doing so and everytime I hear something engage that I assume is the pump when I turn the key to the on position. It just happened again and now I could not get it to start even after waiting a while. Also when I place key in on position I'm not hearing the sound I assume is the pump. It turned on for a second then died and could not restart. Could that be a fuel pump symptom? Is it a fuse? Relay? How can I tell? I appreciate any help. Thanks!

I considered this being an issue as I've encountered something like that before due to other keys on my key ring. Now I have it on it's own. I thought though it had to be flashing if that was the cause. Honestly this car seems to be too high tech for me, lol. The 8th digit is a letter You. If it were the anti theft system would that cause a. Intermittent problem not consistent and b. To start up and then die within a second?

Ok so now I guess a. What does the 8th digit of the vin have to do with it and b. What steps can I take to fix it?

I have checked codes like check engine light. All I've gotten is EGR valve but that's been there for a little while. Don't think it's the cause though I could be wrong. As far as I know those are the only codes I can read. Now weird thing I read about rolling it for a bit and it can reset the system somehow. I don't know but I've tried it all 3 times and it has worked. This last time I paid more attention and heard a click like the wheels or something then tried and car turned on. Now this could be unrelated. Just thought I'd include any info that could pertain. Now just to rule out pump itself: if that was bad then wouldn't car also be susceptible to shutting down while driving? Which it doesn't do. Ok thank you

Yes I read a post from someone somewhere and like I said it mentioned rolling. So I put car in nuetral and roll back then forward. It could be a simple coincidence, but the 3 times this has happened in the last couple weeks it has worked. After rolling I try again and voila car turns on. Today I will be testing fuses to see if theres a bad one somewhere. Other than that I don't know where to look. Wires somewhere? I've read you can't disable the PAS II. I've also noticed that when car is off and locked and security system set it will at random let out a few beeps. Though no one or anything is toouching the vehicle. Could that be related. I feel like there's a short somewhere. It's my assumption the system is connected to the vehicles battery so I don't see it being a low battery unless there is another one somewhere I don't know about. I haven't had battery checked recently but 2 months ago had Les Schwab check it and they said it was good. Getting really lost on where to go from here. With as much as I drive this is a huge inconvenience and loss of assurance.

It cranks and everything sounds like it should, but won't start. I also do not hear the fuel pump turn on when I put key in on position like I normally can when it does start. This not engaging is why it doesn't start I'm assuming. When I do hear it turn on car starts no problem. So essentially I'm trying to figure out what could be causing it to not engage all the time. So far it's happened 3 times about once every 5 days. Aside from those times it works just fine.

Wow, there seems to be a lot of Taurus questions on here. I know you guys will help me.

FACTS:
-Battery fully charged
-While helper turns ignition key to crank, I got under the car and checked the solenoid to starter braided wire with a multimeter. 12 volts.
-While helper turns ignition key to crank, starter makes a loud repetitive clicking sound.
-While helper turns ignition key to crank, while the clicking noise is happening, the serpentine belt and accesories move very very very very slowly.

Could the engine be suffering from hydraulic lock? Could it be something that causes the ignition not to fire? Wouldn't starter still turn motor just as easy if no ignition present? Thank you guys in advance.

What if I take the starter off and power it through the solenoid just as it normally would and it spins pretty good and fast? Could the starter be weak due to an internal problem? Also, just because the battery has 12 volts, and the starter clicks, does that completely rule out the battery?

Hey, I cleaned all the connections from starter to battery. It done the same clicking. So I took the starter out from the top and connected all the wires back. Then I case grounded it. I had my helper turn the ignition to crank and the starter gear engaged then spun like a top. But before the gear spun, the clutch clicked about a dozen times, shouldn't it just move once then spin. In other words, it took about 3 seconds before it started turning. That clicking sound we been hearing is definately the overrunning clutch. Is that normal, is my starter good?