2003 Ford F150 lean fuel bank 2

2003 FORD F-150
100,000 MILES • V8 • 4WD • AUTOMATIC
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KOZY56
  • MEMBER
  • 1 POST
Engine started rough Idling,but okay when going down road. Service engine soon came on,read code,bank 2 fuel lean. I changed fuel filter,air filter and put some injector cleaner in fuel line when filling up at gas station. Didn't change anything. When remove air filter cover,it seems to smooth out. When idling RPMS go up and down and needle flutters also. Do you have any ideas?
Jun 20, 2010 at 11:13 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Lean fuel condition could be caused by one of the following below:

1.Vacuum leaks

2.EGR and PCV valve.

3.Low fuel pressure.

4.Dirty fuel injectors.

5.Mass Air Flow Sensor.

6.Oxygen Sensor.
Jun 20, 2010 at 11:30 PM
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