Car idles hard when I stop at the light. Code: PO130

I recently bought a my 1998 acura tl. Everything was good till the last few weeks ago. The car started to idle really hard and the rpm go up and down when the car isnt moving. When the check engine light came on, I took it to a mechanic and he said to replace both O2 sensor. He reset the check engine light. The person I bought the car from, replace both O2 sensors before selling it to me. Plus I replaced the back one. A week later the light came back on with this code: PO130. I talked to some of my friends and one suggested that my EGR valve needs to be replaced. Another guy told me that my fuel pump may need to be changed. Any advice as to what is wrong with the car is greatly appriciated.