ok guys here is my prolem.... i put a new ka in my car hooked everything up right and have a missfire in cyl4. ive changed out the injector, dizzy cap, plug wire, engine harness, and ecu all from perfect running cars and still have a missfire, motor has good compression and everything and cannot figure it out for the life of me,.... would a bad knock sensor make it missfire? ohh yea i also changed out the maf also.... any comments would be gr8 if you could help me out thanks...