I have been hearing a little hesitation from my car latley i switched the spark plugs hoping that was the problem ,still there . It doesnt happen till the car is warmed up . I didnt drive it for 3 days and i decided to take it into a shop so i drove it around for a 30-40 mins and nothing car ran fine.... today i hear the hesitation again exhaust pops a little to. Its when i first step on the gas at any rpm ( no check engine light on )..so i made a little video....
YouTube - 2004 Pontiac GTP Hesitation