[doodlebob666]

pawn Код:

if(vInfo[i][vehicleFuel] >= 1) 
        { 
            if(vInfo[i][vehicleTires] == 4) 
            { 
                if(vInfo[i][vehicleEngine] == 1) 
                { 
                    SetVehicleParamsEx(GetPlayerVehicleID(playerid),1,lights,alarm,doors,bonnet,boot,objective); 
                } 
            } 
        }

What this is saying is "If the fuel is greater than 1, always keep the car on."
Using "SetVehicleParamsEx(GetPlayerVehicleID(playeri d),1,lights,alarm,doors,bonnet,boot,objective); "
keeps the car on even if the player uses /engine
The player only should control the engine, but it is automatically kept on. Find a way to fix it.

I think you should remove that part of the code then it'll be fixed.