How to make a simple car | Stormworks Tutorial 

You'll be needing a microcontroller/logic for that to happen. You can try adding the key/toggle button output node to an "and" logic, together with a threshold output node, and make the "and" Output node connected to the engine's starter node. Then dont forget to put the engine rps number node to that threshold (set high to 4 or 5, then low can just be 0). Or you can try doing it the same way I did in the video. The logic just makes the engine "start" whenever its turned on and it is below the setpoint rps. And it just stops "starting" when engine rps is good/above the threshold.

@@fear_thisi fixed my rps issues it was just the gearbox

@@fear_thisi was gonna see with the uhh micro controller is there a way to make the throttle go down slowly like if u have 100 percent sensitivity it accelerates super fast is there a way to make it decelerate slow if you let go of the w key but decelerate faster if you hold S

@@fear_thisand for the reverse feature i have to re ignite the engines for my car to reverse on demand cause if i just hold s it will come to a complete stop and not go in reverse unless i hold s and turn the key again so is there a way to make it so i can go forward and go in reverse without touching the key at all like in most racing games and i suppose the engine will stop if i turn the key off

oh and also if i brake i also lose the ability to go forward/reverse unless i reignite the engine so is there a way to handle that also