Engine wont rev

My Mazda tribute is able 2 start but stalls at idling. And when u rev it, it wont go over 4000rpm. The problem started when I was driving the check engine light came on, just after the check engine light came on, the engine started mis_firing. I managed to cancel the check engine light by removing one battery terminal. From there the check engine light went but the next morning the car could not start. Tried to check the fuel pressure the pressure was enough, I also checked the nozzles thy where all operating well, checked the spark all the cylinders where firing. Please help.