Bring your car to casa to have it check the code. Somewhere out there are malfunctioning and need to be found, just dont keep on changing anything w/o knowing what is the problem. Could it be just dirty plug but, you have spend more than it should be.
Iyong idle air control valve ay hindi naman madaling masira at kailangan lang linis nito . Kailangan nga dalin mo sa casa para malaman ang code kung ano ang sira.