p1404, p0141, p0404, p0302, p0341, p0401

I am trying to not spend a lot of money on this. i have an identical car that i can pull parts off of. so far i have put brand new plugs and wires on. I have also taken the egr valve, o2 sensors and throttle position sensor off the old car and put them on. Can you suggest anything else that doesn't involve taking it to a shop