It definitely runs better now. I have noticed that the exhaust smells stronger now. Before I never noticed it but now I can really smell it when backing out of a parking spot, for example. Oh well, I'm filling it up today so I'll see if the fuel mileage changes.

On another note, it has a slight hesitation when I hit a bump. It has had this since I bought it and I assumed it was the CPS after I found the MIL code for it malfunctioning. Now the code is gone but the hesistion is still there. So, if I hit a fairly sharp bump (does not have to be really severe) under light constant throttle, the engine immediately after hitting the bump feels like it studders for a second then return to normal. Never any check engine light and I haven't been able to find any other threads about it. I tend to be really in-tune to what my cars are doing so I notice every new squeak/ rattle, etc that crops up. Most of my passengers look at me like I'm crazy when I'm driving and say "do you feel that"

Anyone else have a similar issue?