check engine light come on in off on 1996 Mitsubishi 3000GT

i change the idel air control valve the light go off after is come back code said throotle position sensor in turn up the car the come back abain code said EGR i dont no what to do help me whit this probleme please

Asked by for the 1996 Mitsubishi 3000GT
Can you take the car to your local auto parts store like Advance, AutoZone, O'Reilley they will scan the codes free. We can better help you with the code numbers you are getting and how the car is acting. Please help us help you! get those and repost.