sputtering when I release the gas pedal...
 

Has anyone seen this problem... I was thinking it may be exhaust related but not too sure. Any hints would be greatly appreciated!

Have you tried running some fuel system cleaner through the car?

Also, check your fuel filter.

You may be on to something...
 

I did run some highly concentrated injector cleaner recently... But can't recall the last time I changed the fuel filter! That may be it. But I did notice that there is a crease in the tailpipe like someone rearended the car... Or someone backed into it and bent it. It is not a full exhaust blockage but I would estimate maybe a 30% decrease in flow... Could this cause it?