Knock sensor replacement

["More Boost"]

ok while I was coming back from NSRA event I decided to put in 87 octane since I was gonna be on the hiway not using boost, man did it ping when I did use any boost, had a monitor 4000e hooked up and it wasnt showing any knock. so do I need a new knock sensor too? but I did get 21.69 mpg with the gas.

I did that exact same thing "once" I thought wouldnt matter on hiway, we were going to car craft in carbondale, IL. (years ago)
I got there still had a half tank, couldn't raise hell in the car. i tried dilluting it with 93, but it still pinged. i was so mad i felt like draining the tank. this was in a 5.0 w/ s-trim supercharger. sorry for rambling, your post just brought back memories

 

[gsbuick65]

well the darn thing wasnt even plugged in, so I plugged it in and ill check for knock after I get the coil pac on.

 

[85ha]

It is really possible that an overtighted knock sensor can pick up a knock? My gn had an engine replaced before I bought it and is getting a reading of 77 on scan tool but I dont hear any noises. wondering if I might have same problem.

 

[gsbuick65]

the way I understand it an overtightened one will make it not pick up knock

 

[BRAD_PADGETT]

the way I understand it an overtightened one will make it not pick up knock

This is the exact opposite. Overtightened and the knock sensor will go off and retard all timing when knock does not exist. Brad