So I went to the dyno a couple of weeks ago, and basically could not get a full run in because the car had pinged. It was late in the day, so the shop didn't really try anything. They did give me a pretty good deal, so I am going back. Anyway, I know pinging is a timing issue, but is there anything else that could lead to it? My graph shows the A/F around 11.5 starting at 2200, but goes down under 10.5 at about 3300, where the dyno run was cut off. Can running excessively rich cause anything? i know that 10.5 isn't that bad, but it was only at 3300 and seems to be getting richer. I have an HI-6 with the btm that I was going to switch out the vortech unit with, and I'm thinking of turning my timing down to about 6. Also, I keep pulling an IAT code, which I have already replaced the sensor, still getting the code. I think its the wiring from the harness, could this cause pining as well? The shop said it shouldn't matter because it only affects it a couple of degrees. Any suggestions, or is anything I'm doing going to help this situation. They are charging 1300 for a tune, and I don't have the money.