VN Engine Problem

Can anyone give me advise i go to start my car and it wont idle at all. I replaced all the sensors and cleaned both faces of the throttle valve and the throttle body and my engine light still comes on. could it be the computer or something else. Can anyone help

Can anyone give me advise i go to start my car and it wont idle at all. I replaced all the sensors and cleaned both faces of the throttle valve and the throttle body and my engine light still comes on. could it be the computer or something else. Can anyone help
does it backfire?,does it run good until it gets warm?

No it wont start at all. It try to but.