[Weirdosport]

Errr, not sure what's going on there but try this:

pawn Код:

public OnPlayerKeyStateChange(playerid,newkeys,oldkeys)
{
    new tempkeys = newkeys-oldkeys;
    if(tempkeys == KEY_FIRE)
    {
        if(IsPlayerInAnyVehicle(playerid))
        {
            SendClientMessage(playerid, 0xFF0000AA, "Nitro is not allowed");
            RemovePlayerFromVehicle(playerid);
        }
    }
    return 1;
}