[JamesC]

pawn Код:

COMMAND:load(playerid,vehicleid, params[])
{
    new id = GetPlayerVehicleID(playerid);
    /*new
        Float:x,
        Float:y,
        Float:z;*/ // Uncomment if you need it.
    if(GetVehicleModel(id) == 476) // Removed previous conditional statement as there was no need for it.
    {
        // GetPlayerPos(playerid,x,y,z); // Uncomment if you need it.

        VehicleFire[id] = 0;
        AddVehicleMissiles(id,2.0,-1.05,0.0); // Since this checks if VehicleFire = 0, set the value of VehicleFire before you call it.
    }
    return 1;
}

There you go, I've commented what was wrong. Also, I have no idea why you get the player's position because you never use it.