Fighting with p0171

[98buicklesabre]

Gonna need help on this one ive been dealing with this p0171 code for about a month ive cleaned the MAF sensor and tested it, ive checked for vac leaks found one and replaced the line . Now im going to do the fuel filter next which i should do since i do get hard starts. and ive been told to change the bank 1 sensor and some say no...any idea what it could be maybe someone with this prior code can help

[Archon]

One of the relatively common causes is a crack in the EGR tube, usually where it is hard to see. One spot is where it connects to the LIM.

[98buicklesabre]

Would just need to replace the tube or something else? i dont know if i should replace the 02 sensor

[Archon]

As I understand it, the tube can be hard to find. Before replacing it, confirm that is the problem. Hold it up to a bright light and see if you can see any small holes. Or, fill it with water and see if there are any leaks.

While it's possible the O2 could be the problem, it wouldn't be at the top of the list. However, if you don't know when it was changed, it may be a good idea to change it just because it may be becoming lazy.