my ecu is giving me codes 14 and 23 iac valve and the knock sensor i am going to replace the knock sensor tomarrow but every time i try to drive the car it loses complete power when i push the pedal to the floor if i just drive it normal nothing happens the swap came with an msd ignition is this a problem

 

You probably have them switched, the plugs are the same. Check that the knock sensor wire is going to the correct pin (B19) at the ecu.