Trouble code PO171 and P0174 keep coming up. I checked for vacuum leaks and have changed the Mass Air Flow Sensor but every time the "Service Engine Soon" light is reset it will only go about 30 miles before coming back on. The car runs fine but at idle the engine is always hunting for the correct idle speed going between ~600 and 800rpms. Any suggestions would be greatly appreciated. Thanks You.
Mar 21, 2009 at 2:11 PM
