Timing is controlled by the PCM (Power train Control Module). The knock sensor retards timing when it detects pre-ignition.
What they are saying, I think, is that if you disconnect the battery the PCM will re-learn engine parameters (timing/fuel) based on feedback from the engine sensors.
Unless equipped with a distributor, base timing in not adjustable.
Saturday, December 19th, 2020 AT 10:06 AM