got a ? yesterday i was at the track and was having problems tuning motor it always seemed like bottom end was lean. it had that 3-4 second high idle rev when letting off the gas. now with that being said it was only like 30 degrees out and i was running a c6tgc. would have went hotter to see if that was the problem but i did not have any nova plugs and shop only had the c6tgc. could this be why i would be having the brief erratic high idle?