k i swapped out my ebay cold air intake that i had and put back in the stock airbox with a k&n. while i was at it i cleaned the maf, iac, and tps. i got it all together and now it idles a lot better but when im driving 1st and 2nd gear feel fine, but 3rd and 4th feel sluggish in the lower rpms. almost like it wants to bog down. this just started after putting back on the stock airbox. anyone have any ideas??