Hello I have a Saab 9-3 2.0 t I have the hesitation problem when flooring the car when it shifts to lower gear and hits higher rpms the engine hesitates... I changed the plugs and cleaned the maf put fuel injector cleaner and the car was running sweet I could floor it and nothing happened but unfortunetely it came back so I figured since I only cleaned the maf maybe its faulty so I changed it but nothing happened plz help