Show a pickture a mechanical fuel pump

SOURCE: how hard to replace fuel pump on 1995 camaro?

yea most american made cars have the fuel pump in the tank.....just drop the tank and replace....not that hard to do but you will need a helping hand...not something id attempt on my own......did you check the fuel pump relay and fuse.....that could be i too....try that first its cheaper....hope this helps :)

SOURCE: fuel pump problem 1991 s-10 2.8

Sounds like the Vehicle is POSESTED LoL ,
I would Hardwire a Key on wire around the origanal wires. Fuel Pump IS NOT going to set a Trouble Code at all ever, as it is an electrical component like headlights, as for the missfiring & guage reading above full I see nothing in commen with the 2 as long as the Supply and return hoses are
not swaped witch they cant be because it wouldnt run (thinking on keyboard) LoL-- Also check Fuel presure regulator. Hope this Helps you.

SOURCE: wont start security light stays on

Body Control Module (BCM) on both counts. Find a shop in your town that specializes in electrical systems to test it. Beware, these can be intermittent problems, so make sure they keep it until the car does what you have observed. Expect to spend about $450 for the replacment. Dealers quoted me between $700 and $1,100 for the same repair. By the way, a new BCM will probably only last you about 12 months.

SOURCE: car cranks but doesn't start, no fuel pump sounds

have u ck spark,,fuel pump reley,,

SOURCE: 2004 Chevy Cavalier - car cranks over but won't start

Well, let me try to say this without being too offensive.....
Your car only quit running on you once. I find it really hard to believe that all of the parts you replaced so far, needed to be replaced to get the engine running again. It is EXTREMELY UNLIKELY that all of these "failures" would occur all at the same time.

You would rather pay for $500+ in parts that the car apparently did not need, than to pay to have it towed to a shop where they have the knowledge, training and equipment necessary to properly diagnose the vehicle and get it running again? And now you want someone to tell you what is causing the problem with your vehicle without the benifit of any diagnostic testing?

There is NO WAY that ANYONE can accurately tell you what is wrong with your vehicle without following the correct diagnostic procedures recommended by the vehicle manufacturer. The most anyone can do online without proper diagnosis and testing is GUESS! You seem to be doing that very well on your own.