Ok. So I have a knock gauge in my modded 1986 GN. It's got a green section of leds, a yellow section of leds and a red section of leds. It's never been of much help. It's never been of much help because first I don't know for sure how to read it. and second, it will be whatever random color it feels like when I start it. I start it and sometimes it's green, then most times I start it and it's in yellow, sometimes it'll be In red. And you think when it's in red I would hear knocking, but no matter where the gauge is at, the car runs the same. I asked the previous owner, (who isn't really that big into modding cars, he bought the car modded) how this knock gauge worked, and he said "oh it never really did anything. I was told it ran off something on the driveshaft" So I was doing some looking around because what he said makes no sense. And I found this.... does this look like a knock sensor to you guys?? And if so.. why is it back here?
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