If the ecm still has the factory label on it it should have the three or four letter calpack code (like HWX or AKRK) on it along with the ECM number like 1228063. -- Robert W. Hughes (Bob) BackYard Engineering 29:40.237N, 95:28.726W or perhaps 30:55.265N, 95:20.590W Houston, Texas "The city with too much Oxygen" rwhughe at oplink.net