Anyone know what part is out when the scanner read car running lean bank 2. Please help ! I have a prochamber with mil eliminators.

 

My guys says its the Mass Airflow Sensor. I've got the same issue. I clean out the MAF and reset the code, good for about a week. Now I'me changing out the MAF sensor to see if it's any better.
Also, if you're running an oiled filter (K&N or BBK style) it could be too much oil on the filter. Clean it, re-oil it, clean the MAF and reset the code. That may help

 

There are exceptions, but for the most part, anything before the intake manifold will affect both banks. Probably a vacuum leak on the bank 2 side of the intake manifold, exhaust manifold, egr system. Pretty much anywhere between the o2 sensor and the intake manifold.

 

How old are the spark plugs?

 

never mind..the post is from 2010. wtf.