I originally had a post about getting the code P0171, lean, bank 1. I have replaced both O2 sensors withing the last year, cleaned the Mass air flow sensor, and have changed the fuel filter.
I have a K&N air filter and a tornado in the car right now. Thinking back, I never had this problem when I bought the "Pre-oiled" brand new K&N. These problem arose just after last summer after I had re-oiled the K&N. My question is would a improperly oiled K&N cause this due to lack of flow or some oil build up of some kind, or is this a chance event that is not related? Keep in mind that I cleaned the mass air flow recently.
Other ideas I had:
Bad engine computer
Clogged Injector
Aside from the poorer gas milage and the engine light the car runs normal!
Sorry for the long post.
Thanks,
Jason
