Recently when i drive my car it bogs out BAD. I replaced cap, rotor, O2 sensor, and fuel filter and its still bogging out really bad. When you floor it the RPMs stick at 3500 and the car gains no speed what so ever. What could be causing this problem? Maybe the plugs, or even worse the fuel pump is shot, whats your guys opinons on this? I figured i'd stop wasting money on just guess and check repairing because i'm 0 for 4 with that.