O.K., I've got the tap on 1796. I've been trying to figure out when it happens. It seems that the car has to be hot first. From what I've read I can get the computer flashed to be rid of the problem. Does anyone know at what serial number the "02" flash starts, (Is 1796 an "01")? I'd like to hear if people that have had their computers flashed are happy with the results? Any power loss? Is whatever causes the tapping even damaging the engine?