Last minute install questions

Originally Posted by SouthArk370Z

What they said.

If you pull the battery cable and discharge the capacitors in the ECM (step on the brake for a second or two), then the car has no idea what you are doing. As long as everything is re-connected properly before you power back up, the car doesn't know that anything happened.

I thought they fixed the window problem in later models such as OPs 2016.

Edit: Powering down will reset learned tuning parameters (ECM will relearn quickly but car may run a little rough for a few minutes) and you will need to go through several drive cycles before the pollution controls will report as ready.