I've got a check engine light on and the code it's giving me is a P0171 which means my "System is Lean." Anyone have any ideas on what exactly this could be and how would I fix it? My guess is it would be a faulty O2 sensor or clogged fuel injectors/pump/filter... Thanks

 

I got the same problem with my 99 Si.......i think it is due to low static fuel pressure get and a fuel pressure gauge and adjust your fuel pressure via a FPR