I don't think it the o2 sensor cox there's no smoke or anything because i face this problem before in another car the problem was with the o2 sensor and the car gave smoke like it was a dieseal car ..and plus there's no engine light and rpm idle is smooth so that also means that my cat isnt chowked hopefully .
and cat chocked go i dont think that either cox when i rev the car it dosnt act like somting choked and goes to 0 to 100 easily .
but cant say about the injector will get it checked tomorrow.
but i think it needs a tune up .