[The_Moddler]

pawn Код:

new Nitro[MAX_PLAYERS];

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys == 12)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            Nitro[playerid] = SetTimerEx("Nitros", 1000, true, "i", GetPlayerVehicleID(playerid));
        }
    }
    else
    {
        KillTimer(Nitro[playerid]);
    }
}

forward Nitros(vehicleid);
public Nitros(vehicleid)
{
    AddVehicleComponent(vehicleid, 1010);
    return 1;
}

There you go.