[RealWorldGTA]

you have no function call to update the damage to the vehicles tires.

Код:

stock PopPlayerTires(playerid)
{
	new vehicleid = GetPlayerVehicleID(playerid);
	new panels, doors, lights, tires;
	GetVehicleDamageStatus(vehicleid, panels, doors, lights, tires);
	UpdateVehicleDamageStatus(vehicleid, panels, doors, lights, 15);
}

strongly suggest checking to ensure a player is in a vehicle before function call...

On an After Thought, you dont even have anything detecting if the player is in a vehicle, or if the vehicle is touching the object.. Someone released a SpikeStrip system a while back.. heres the Source: http://pastebin.com/W5d6WH1F

That options uses Pickups, theres another option for a very small area check ... but i would suggest pickups as you don't need a timer or ticker.