I know this is off topic, but is there a website with a install guide for the plx-m300 with my s300? Mine didnt come with any instructions and when I searched the internet I havent come up with anything.
The Installation guide that you have is wrong , I hooked up the white wire wich reads reads wideband leanar output to D14 and the PLX and the Hondata reads the same AFR , only .1 difference ! I left the grey wire unhooked .