SD Tuning - What to do after the table is complete - i.e. what do you turn back on

[Keep]

The thing about these knock sensors, they can output a valid, but wrong, signal when they are getting to end of life. Old O2 sensors can do the same thing. There are more failure modes than just shorted or open.

Good point. I think I will be safe and replace them both. I cannot remember if they were replaced when I rebuilt the engine.

[Alvin]

Nope, no codes, nothing else to indicate an issue with a knock sensor. I remember seeing/reading something about needing to "desensitize" the sensors with any changes. I will dig into that a bit.

When knock sensors go bad they either get way overly sensitive, loose all sensitivity, or happen to throw a code. I'd try new knock sensors especially if they have some age