No knock!!!
Thread Starter
Instructor
Joined: Nov 2009
Posts: 164
Likes: 1
From: Dubuque, IA
No knock!!!
Got a 99 vert with LS2 402 and for some reason I am not getting any knock what-so-ever. We try and force a knock and not even .0001 of knock, not even anything we can hear. The knock sensors are positioned behind the motor mounts on both sides with adaptor harness. Any ideas. Oh, and no codes. Thanks
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Put a scanner on it and graph the knock sensor output or the spark advance while you bang on the engine with a wrench close to the knock sensor(s). As you bang on it, the sensor should see your "noise" as a knock and change the timing.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
