No power when pressing on the gas
I have a 2002 Mitsubishi Lancer OZ rally 5 speed. The engine runs fine but when i put it in gear it has a bad slow acceleration, and little to no power through any gear i put it in. and if i try to push the pedal to the floor it acts like there is nothing there and the RPM gauge redlines and the car revs high but the car doesnt move. It doesnt jerk or anything. i dont have a problem getting it in gear but was told it could be the clutch or slave cylinder. Ive checked the air filter and even removed it and took it for a drive and still same thing. check engine light is on but says that a O2 is bad.
its a manual