Help engine trouble

I recently bought a 1994 Thunderbird with a 4.6L. It is a little rough, the engine idles ruff and cuts out on take off. the Check engine light is on I read the codes it was P0174 (Engine running lean bank 2). A guy told me that I needed to replace the fuel filter and run some injector cleaner through it. I did, no change I replaced the injectors and the TPS (throttal position senser). it still runs rough The lady that had it before me said she replaced 2 oxygen sensers, that where no good. I know that there is four. Could that be my problem? I don't know what to do now. any help would be greatly appreciated

the o2 sensors could be the culprit. I had that problem with my 93 5.0, but I only have 2 o2 sensors, but it made a huge difference changing them

my 1994 thunderbird lx is doing something wierd. it has the smell of gas when i drive. also there is sort of a farting noise when i push the accelerator. could that be linked and also what should i do to it.

Turk1970, could your cat be cloged? Mine got cloged and wouldnt let you give it any gas, otherwise it would die. Hope this helps