i noticed sometimes when i get in the car and press on the gas pedal it sticks,like i'd have to press on it 2-3 times to before it loosens up.i got the car in april at 82k and since then i put 2k on it and i don't know how the previous owner took care of it.could it be a clogged pcv valve?and if so is there anything else i need to replace /clean while changing the pcv valve?i know i have to clean the throttle plate