Hi all. This is my first post and my first HD after a lifetime of riding. I have always wanted a Springer and that's what I got! I bought a 2003 Heritage Springer that was completely stock except for some fishtail slip-ons. I had done some research about mapping the FI system and decided to put the stock pipes back on it because the original owner said he never had it remapped. I have read several threads about a lean mixture causing surging. That is exactly what my Springer is doing when I am not accelerating or cruising at 60 plus MPH. It's real subtle and at first I thought it might be the Springer front end. I noticed that it's not as bad when the bike is cold, but as it warms up, it gets worse. Nothing ridiculous, but my wife even noticed from the back seat. Does this sound like its running extra lean? I read about pinging and think I might hear that too. I first thought someone in a VW beetle was following me around and then figured out it was ME. Is that the pinging sound from lean mixture? I was thinking, after reading all these great posts, that I should invest in a PCIII to help with the problem. I want to upgrade the exhaust to true duals and a big sucker air cleaner at some point, so the PCIII would let me remap as I go. Any and all suggestions or tips are welcome!