I have an 03' Lancer w/a 2.0 and it has 227,000 miles on it. The problem I am having is a lack of power during acceleration. Here is what I have done to try and find the problem. The OBD is giving no codes. I have put in a new fuel pump, fuel injectors, fuel regulator, spark plugs, both oxygen sensors and spark plug coils. The engine starts and idles fine, but will not accelerate fast when trying to pick up speed at over 30 mph. I am beginning to think maybe the Mas Airflow Sensor or the Catalytic Converter may be the problem, but still no codes to tell me that. Thanks for any responses, I am LOST!!