I have that code but thats because my TMIC tabs blew and im waiting for a new one plus i have a vac leak from behind the manifold (subaru should really clamp those down) And i am only stage 1.
Code: P0171 bank 1 system lean
What you can first try is to clean your maf? If not that a smoke test. Thats how i found my leaks.
Last edited by F-WDC Spec B; 01-25-2013 at 08:41 AM..
Reason: more info