knock sensor and cylinder 1 misfire codes coming up...changed plugs, wires, cap, rotor. bought knock sensor but not put in yet. Does it need to be replaced? Car still running like timing is retarded...low idle and rough when at a constant lower speed like 45mph By the way it is a 96 GXE with 196,000 mi. Ran excellent before this.

 

Knock sensor needs to be replaced.... very common Nissan problem.