Recently while entering an onramp my car suddendly had this sudden burst of acceleration and my tires chirped when shifting from 3rd to 4th in an automatic. I was pushin the car hard accelerating and this sudden burst of acceleration came when under an overpass. This has never happened again. The only reason I can think of is that under the bridge there was colder air and when I hit that cold air the car accelerated faster. Has anyone heard of this before or had it happen to them? Let me know what you think. I have a factory intake with just a kandn filter.