Ever since the weather got warm (aka got REALLY hot/humid 100*+) my car has been acting really weird, and it's really starting to worry me. The car drives like complete shit. Here's the problem:

If I start out at a stop, my acceleration is great up to about 6500-6800 RPM, until I shift into a higher gear. Once I shift, and put the pedal back to the floor the RPMs bog down about 500-1000 and then make it slowly back up to where it should be. It sounds to ME (no expert here) like the car is running WAY too rich, and causing it to bog down whenever its run hard. If you watch the link I put in the post you can see an example of me going hard from ~10 mph to 90mph. At about 15-18 seconds into the video you can see exactly what I am talking about.

Any insight into what may be wrong with my car would be much appreciated Mafia!
Thanks a ton in advance guys!

PS. Enjoy the sound of the car with the windows down :D I love it!!!