hey h-t...i was driving my car and all of a sudden at 2500 rpm my car started to bog like there wasnt enough fuel or may be too much fuel ...anyway i let off on the gas pedal, then i pressed the gas again and it was fine....this happens to me atleast twice on a 30 minute drive does anyone whats the problem?also my idle isn't consistent its sometimes at 800 and sometimes at 1500...

 

my car does that randomly too...ive been told to check cap and rotor