[RIDE2DAY]

You must keep in mind that the SA-MP Wiki says "this does not include vehicle health changes" in OnVehicleDamageStatusUpdate, so... I guess you know you're able to put a car on fire (decrease its health) shooting it without damaging any of its components (panels, doors, lights, tires).

Anyway, you might use a global timer to check all vehicles' health.

EDIT #1: global timer.

PHP код:

public OnGameModeInit()
{
    SetTimer("CheckVehHealth", 1000, true);
    return 1;
}
forward CheckVehHealth();
public CheckVehHealth()
{
    new Float:g_VehHealth;
    for(new x = 1, t = GetVehiclePoolSize(); x <= t; x++)
    {
        if(!GetVehicleModel(x)) continue;
        
        GetVehicleHealth(x, g_VehHealth);
        
        if(g_VehHealth < 250.0)
        {
            SetVehicleHealth(x, 250.0);
            /* Check vehicle's health status here: https://sampwiki.blast.hk/wiki/VehicleHealth */
        }
    }
    return 1;
}