If the fuel system is running lean you might have a vacuum leak or a bad oxygen sensor.
The first thing to do is to pull the trouble codes to eliminate the oxygen sensor. Any Advance Auto or Auto Zone will do this for free.
Dec 18, 2012 at 6:00 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.