F- 150 problem 1998

I have a 1998 Ford F-150 4x4 XLT with 126.000 miles on the. I have replaced the injector. But I have some other problems. 1 is that the dianostics code reads that I am running rich in bank 2. I had the same reading on bank 1 and replaced the O2 sensor and the problem hasn't came up. except on the 2nd bank. The other problem is that the truck acts lke it doesn't have have the power it should. But when I set at idel the engine wants to surge or like hunts if I like boost the gas alittle. I tried to trouble shoot with the hanes man and the only thing that the manual explains to me to be the AIC valve on the throttle body. could this be the problem and does the throttle body be replace or can the valve be bought at a parts store.

I think it is a good idea to replace bank 1&2 o2 sensors when 1 goes bad. I also bet you need to replace your catalytic converter

Another quick suggestion would to be to replace the MAP sensor about 80 bucks but it reads all of the air intake into the engine, and changing the other o2 wouldn't hurt, and a good tune up. Be sure to unhook your negative battery cable