knock sensor ID

[Shannen Durphey]

Dave Williams wrote:
> 
>  I snagged eight knock sensors on my last trip to the junkyard.  They
> don't have part numbers, at least that I noticed, but the plastic
> connector sections are various colors.  I assume the color codes match
> to their tuned frequencies or something.  Does anyone have any data?
> 
look for numbers faintly stamped into the large diameter of the metal
shell.  May have to use scotch brite to clean it.  Not all sensors
have numbers on them.
Shannen