Just remember that the sensor and the module are two totally different things. I'm not suggesting you need to do anything with the sensor. But if you want the existing EFI to do knock retard like factory, then the knock module is what you have to adjust, and all it does is pull a line low to tell the ECM/PCM when it thinks knock is occurring. Sounds simple in theory, but when we don't know the pinouts for the module and have to account for how much knock to report and when, things get tricky.

There are absolutely other ways of doing it. It's ultimately only if you want to use factory hardware that you end up in the situation where you would need to create your own custom knock module.