I've noticed this quite often, especially when its cold. It doesnt miss or run rough at all. No codes. I changed the spark plugs 5 months ago and i clean the aem dry filter every month. It doesnt get up to speed all that quick. I mean even 90' camrys out accelerate me from a stop. I have a airaid jr with a aem dry filter. Truck does have a exhaust leak. Any advice?