[Quincy_Gatlin]

I set mine around 260 for a nice dark black smoke but not quite on fire yet, and the way I did it was with a timer that gets vehicles health and if gets below 260 is automatically sets the health to 260 and shuts the engine off and won't let you start it back.

pawn Код:

forward RPTimers();
forward VehicleHealthSet();
forward BrokenCar();
new RolePlayTimer;
new CarIsBroken[MAX_VEHICLES] = 0;

pawn Код:

OnGameModeInIt()
{
     RolePlayTimer = SetTimer("RPTimers", 1000, 1);
     return 1;
}

pawn Код:

public RPTimers()
{
    for(new i = 0; i < MAX_PLAYERS; i++)
    {
        if(IsPlayerConnected(i))
        {
                    new Float:h;
                    new veh = GetPlayerVehicleID(playerid);
                    GetVehicleHealth(veh, h);
                    if(h <= 260)
                    {
                         BrokenCar();
                    }
                 }
         }
         return 1;
}

pawn Код:

public BrokenCar()
{
    for(new i = 0; i< MAX_PLAYERS; i++)
    {
        new string[256];
        new name[MAX_PLAYERS];
        GetPlayerName(i, name, sizeof(name));
            new veh = GetPlayerVehicleID(playerid);
        if(IsPlayerInVehicle(i, veh))
        {
                    SetVehicleHealth(veh, 260.000);
                    CarIsBroken[veh] = 1;
                        new engine, lights, alarm, doors, bonnet, boot, objective;
            GetVehicleParamsEx(veh, engine, lights, alarm, doors, bonnet, boot, objective);
            SetVehicleParamsEx(veh, VEHICLE_PARAMS_OFF, lights, alarm, locked, bonnet, boot, objective);
            EngineRunning[veh] = 0; //however your engine commands is set up
            format(string, sizeof(string), "** %s's vehicle's engine stalled", name);
            ProxDetector(30.0, i, string, COLOR_PURPLE, COLOR_PURPLE, COLOR_PURPLE, COLOR_PURPLE, COLOR_PURPLE);
        }

pawn Код:

if(strcmp(cmdtext, "/engine", true) == 0)
    {
             new veh = GetPlayerVehicleID(playerid);
             if(CarIsBroken[veh] == 0 &&//whatever you use to tell if engine is running)
             {
                  //Code to start your car
             }
             else
             {
                  //Don't start the car
             }
             return 1;
         }

Just a small example of kinda how my code is set up, maybe you can look at it a little and kind of understand a little more.

And I know the indentation is right but I don't have time to fix it correctly doesn't really matter as this is just an example.