I'm making a mod for the Covet, and I made an engine. However, when I turn it off, the horsepower becomes negative, and the engine won't turn back on. When I try the engine turns 0 RPM. It is not underpowered or anything which is what confuses me. Anybody got an idea?
Your starter is prob not strong enough. Prob has nothing to do with your HP. try somthing like: "starterTorque":200, "starterMaxRPM":500,
By the way, I often have to convert kilowatts to horsepower for correct settings. And then from horsepower to torque. Maybe someone will find it useful: https://www.asutpp.com/kw-to-hp.html
You'll have to edit the power curve such that at any reasonable point on it the power stays above negative. If an engine dips into negative power the game considers the engine broken.