Will not pass smog because of lean mixsture fault code

Tiny
STEVEK
  • MEMBER
  • 1999 CHEVROLET EXPRESS
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Hi, I have a 1999 express van that has a lean mixture fault code and will not pass smog because of it, it is a 350 motor
Do you
have the same problem?
Yes
No
Sunday, January 16th, 2011 AT 7:51 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.
Was this
answer
helpful?
Yes
No
Sunday, January 16th, 2011 AT 11:19 PM

Please login or register to post a reply.

Sponsored links