Originally Posted by
B00STJUNKY
Also, you're logging a lot of unrelated/unnecessary PIDs, which can slow down the sampling rate of other PIDs that are important. I'd trim down your list of log parameters, then when you have all the relevant parameters selected for the purposes of your diagnosis, go to the Knock Sensor 1 and 2 PIDs in your channel list, right click, and select the fastest polling interval you can. You may not be seeing the knock sensor voltage spikes in the trend due to having your polling interval set too low, along with logging way too many channels.