CharlieS
GOLD Star
I haven't finished my coffee, and don't know a lot here, but wonder if something like a knock sensor failing/failed could cause significant changes to where the ignition fires during the compression stroke as is shown in the data in that last image?
If so, (and someone is kindly going to tell me to go read the FSM) I wonder if there is an easy bench test to verify correct knock sensor function?
If so, (and someone is kindly going to tell me to go read the FSM) I wonder if there is an easy bench test to verify correct knock sensor function?