[n00b on demand]

Just a little update for everyone here about this issue incase you care . I bought a K&N air filter from Chike back in november and ever since i instaled that the hesitation has not returned. Of course the temps have been freezing but when ive ran the car with the a/c on or defrost on there was no hesitation. The only hesitation i get is the normal hesitation when the engine is cold. I wonder if maybe the new air filter has made the ECU settle down or something . The real test will be in the summer when it gets hot and muggy outside. Does anyone have any ideas why a car would run so sluggishly during the summer as opposed to the winter? I am also going to be cleaning my throttle bodies this week sometime weather permitting and i went to the auto store to get throttle body cleaner but they were all out.....i have fluel injector/ air intake cleaner....can i just use that? I have 2 cans of carb and choke spray in the garage but those were my dads and havent been used in yrs...probably 10 years or so.