Went for a spirited drive last night and noticed a weird surging feel, especially in the higher gears (4-5) where the load is increased... What could this be? I know people say put the NGK's in to stop this from happening when you up the boost, but im on stock level with a CAI only..! Does anyone else ever have this feeling or know what I am talking about..? Mind you it has been very humid with temps in the high 80's the past couple of days.