Everything on the car is going crazy and then it just don't start

check the oxygen sensor
chech the exhust system

Here are the possible reasons, engine misfiring, low fuel pressure from a clogged filter or defective fuel pump inside the gas tank, excessive exhaust system backpressure.

Change both.

Some cars do, some don't. You will just have to look. Trust me, I wish all cars had an access panel, cause dropping tanks is not fun....ever.
Check all rubber hose connections and replace the loose, dried out, turn your fingers black, leaking hose's. Will save you time and prevent headaches.
Triple check everything as you reassemble, because it's a real pain to go backwards.
I hope you got an OE pump either thru your parts store or even better from a dealer.
Do not waste your time with a $50 dollar chinese cheapo. (Unless your going to make a habit of changing your pump!!)

AND please change the fuel filter.
AND, make sure the tank has at least 5 gallons of gas in it, before you try to start it.
Most tank baffles wont let 1 or 2 gallons reach the pump, sitting still.
AND when you think your ready to start it, crawl under there and check all the connections again!!

A blocked exhaust pipe will do this. Possibly just the catalytic is plugged, but you make it sound worse than just that.
Disconnect the exhaust at the manifold then start the engine, see how it behaves. If it revs up (loudly) you know it the exhaust system. Consider the neibours too. Do not run the engine for any length of time like this as you can damage valves when they cool too fast.
If it revs freely 2 - 3 times, then take to an exhaust shop for service. Or do it yourself?
Good luck

Clogged injector fuel rail.

I have the same problem with not starting. I have noticed that if I go easy on the gas pedal right before I pull into the parking space or the last 20-30 seconds before I shut off the engine, it will "cooperate" much better when I start next time. Also fillip up on Shell V-Power premium twice in a row on long trips seems to solve the problem for a few days; have no idea why!

It may not be a fuel problem. Unhook the exhaust. The catalytic converter may be blocked. This will result in start, then stop right away problem. Do this first before you drive yourself crazy, as it did me on one occasion. Thinking it was an electrical problem.

Change your fuel filter. **** at the bottom of your gas tank probably clogged it.

make sure you plugged everything back in and no vacuum leaks.