well i thought that as well, but when I got my plugs changed at the dealership, I had them check the injectors, and they said they tested fine.

 

I may change them though just for peice of mind. I have to be running rich because I did have to replace my cats with high-flows due to the p0420 code. Bad part is I dont have any codes now. but my mileage and power still suck...I was hoping the new plugs and cats would fix it.