[Joe Staff]

You're going to have to create a parameter-less callback then run a loop every run.

pawn Код:

public OnGameModeInit()
{
    SetTimer("MyCallBack",500,1);
}
forward MyCallBack();
public MyCallBack()
{
    new Float:vhp;
    for(new vehicleid; vehicleid<MAX_VEHICLES;vehicleid++)
    {
        if(GetVehicleModel(vehicleid)==0)continue; //only returns 0 when vehicle is invalid (not spawned)
        GetVehicleHealth(vehicleid,vhp);
        if(vhp<300.0)SetVehicleHealth(vehicleid,300);
    }
}