Hondata

Ive attempted to return my 8th gen Si back to stock but Ive been unsuccessful at starting the car. After returning to stock in Flashpro, it loads and complete as per usual. Following that, I check the Flashpro tab to make sure there's no stored calibration on the unit. The engine swings but will not start.

I thought it was the key fob issue but it is not. Ive have had the car checked out at a dealership. They've tried reprogramming the ECU and the key fobs but the car will not start when it's returned to stock.

What makes this even more Interesting is if I load my custom tune in it, adjusted for stock injectors the car fires right up and drives without issue.

Any idea what I am missing? Or what the issue could be?

With everything plugged in and the ignition in the on position, go to the Help menu and click on “send feedback”. Include a detailed description of the issue.

Spunkster wrote: Fri Dec 12, 2025 2:25 pm With everything plugged in and the ignition in the on position, go to the Help menu and click on “send feedback”. Include a detailed description of the issue.

Great. I just sent in the feedback a few minutes ago. Happy to send more data if needed.

Did you get the car to start?

-Ed