I’m really happy with your game and thoroughly enjoy it. Physics are spot on and I really like the real life features like separate ignition and starting of the car. My wish for an additional feature is related. I would love it if the car could be turned of when you click “Race” and are launched into the pit box. Now the engine is running and would like to have a choice to have the engine off when starting. Even more real and immersive would be the addiction of a master switch. That way I could enter the car with a ‘dead’ system. No dash,no nothing. Start up procedure would be extremely cool. Button boxes and simhub dashboard builds would become even more life like and the cold start part of the full package.
Try here I think it covers what you want. It worked for me. https://forum.studio-397.com/index.php?threads/engine-manual-start.59231/#post-933503 PS. it helps if you put relevant info in title of thread like Ignition or auto start, It helps for "search"