My 4runner is getting bad gas mileage. I've change the spark plugs, air filer, o2 sensors, and the pcv valve. Is there anything else?:banghead:

Wires, cap, and rotor. Check the air pressure in the tires too.

What year what engine? I would suggest a fuel system cleaner and def a new fuel filter if you haven't replaced that yet. My business sells Amsoil so i use their P.I. and i also do a treatment with a fluid called "Sea Foam". You can buy it at the parts store and follow the directions for the Vacuum hose treatment. Good luck.