Last summer, I noticed I had some pinging under load (up a gentle hill in 4th or 5th gear) while driving home from a show in Rochester. When I checked my timing the next day, it was dead on what I last set it to in the early Spring. Took it out for a drive, similar temperature and humidity, no problems at all. Not long after that, I started noticing that my idle was occasionally high at stop lights. Not much, just a couple hundred rpm. I figured something was sticking, so when it happened once