I have read many threads about people pinging with the GIAC chip. Some worse than others. When I initially installed the chip 2 years ago I had no pinging but as time went by it started to develop. In my case I was pinging for a second during the initial punch then it would go away. Well, a few days ago I slapped in some Penzoil fuel injector cleaner when I filled up. I have gone through 3/4 of the tank and my pinging has totally gone away. Today it was fairly warm out and the car ran awesome, no pinging at all and the throttle responce is razor sharp. I know fuel injector cleaner is nothing new but for the people that are experiencing pinging and have not tried a cleaner do so. Worked for me! http://****************.com/smile/emthup.gif http://****************.com/smile/emthup.gif