Running too lean 99 Ford Expedition bank 1 and bank 2

Tiny
HONEYBOY
  • MEMBER
  • 1999 FORD EXPEDITION
  • 18,000 MILES
Feels like its not running on all cylinders
Thursday, October 20th, 2011 AT 11:44 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Wednesday, October 26th, 2011 AT 12:39 PM

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