So I finally got the 60#'s in and a 2.7" pulley......for some reason in 2nd gear it goes way lean from about 3700-6400 (13.2-1) but in all other gears it is perfectly fine.....any one have any ideas.....was running basically a GM stg 2 before with no problems.

 

because u cant run a stg2 tune with 60s and a 2.7

 

I have retuned the injectors per the sticky.....idles fine and runs great when you are not in 2nd
it runs good in 2nd but way to lean

 

No ideas....only goes lean at WOT, partial throttle is good.

 

Sounds like you need to tune your maf.

 

u installed 60s anda 2.7 on the stg 2 tune....... um theres ur problem

 

I have hp tuners...been working on the tune...did not just change the parts. I know that would not work.