Please help me with these codes on my sisters Z28

[mvvette97]

I was doing some tuning on her 98 Z28 and it keeps setting these codes. I even flashed it back to stock. P0131, P0151, P0137, P0157. I have it posted on LS1 tech with an efi live log.
http://www.ls1tech.com/forums/showthread.php?t=922793

[stroker97k1500]

some were misfire codes others were for the o2 sensors.... could you possibly have an intake gasket leaking?
Robby

[mvvette97]

I'm not sure. It may have a leak. She just got the car so I'll be sure to check that.

[joecar]

www.ls2.com (http://www.ls2.com) and www.gearchatter.com have comprehensive lists of DTC and their description and diagnostic procedures.