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Q: cant get rid of codes and skip at idle 0304 0505 do i need to change injector? on 2002 Nissan Xterra

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knock sensor,plugs,wires,cap,rotor,air fuel filters intake&plenum gaskets throttle position switch good fuel and cleaners added dry gas oil and filter comp #4 125lbs all done yesterday
(2) Answers
With what you have done already, you might as well change that injector......you can swap injectors and see if code goes away. If injector is faulty, the code will move to the new position and you will know it is faulty. Clean it up best you can while it is out. The p0505 is for the IAC valve (idle air control) may need removed and cleaned or replaced.
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