To my Honda smart/elite minded

[Ludester]

Dude, did you over rev the engine before the problem started?

[B16a2 Civic]

Dude, did you over rev the engine before the problem started?

...no, i only came close to redlining my car once and that was at the track and i shifted at 8300, and this was almost a year ago.
i kno its not a bent valve, or a blown headgasket, i checked all those routes.
basically it comes down to:
my o2 sensor is out so my ecu doesnt know how much fuel to put out
fuel pump bad
fuel pressure regulator is bad
the problem is clearly my fuel cause it feels like my engine isnt gettin any, i just wanted some input and advice from some good/great mechanic minded people..
i dont wanna commit to changing those if its not needed, i was hoping some mechanic on here had this problem and fixed it or someone had or knows with this same problem and it was fixed.