Why when I push my gas pedal down to the floor my car harshly hesitates and gets no extra power? In fact it lags and sputters. I have very slow acceleration with zero power. Rough Idle and occasionally stalls because of it. Runs great in the cold for about 2 mins then when it warms up it acts up. Any ideas? I've replaced the fuel filter, spark plugs and wires, head gasket and ran fuel injector and line cleaner through. When I did it ran perfect for about 24 hrs and went right back to the same problem.
Also the check engine light comes on occasionally when it REALLY acts up. When it does I barely push the gas pedal and it sputters five times worse then usual. It will usually clear it's self up in 30-60 seconds and the check engine light go's off.....
Oh my bad....2001 Kia Rio 1.5L