SPONSORED LINKS

2000 Buick Park Avenue bank one

Tiny
04MRP194617
  • MEMBER
  • 2000 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
Read out says bank one is lean I have changed plugs, plug wires installed new sensors but still missing when idling after trying it the light comes back on reading lean bank one still.
Monday, February 1st, 2010 AT 11:58 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lean condition:

Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (Use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (Try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, February 1st, 2010 AT 12:05 PM

Please login or register to post a reply.

Related Engine Lean Content

How To Fix an Engine Backfire
VIDEO
How To Fix an Engine Backfire
Instructional repair video
Lean Exhaust
GUIDE
Lean Exhaust
Common Misconception: When an engine misfires, the cylinder runs lean, not rich, this is because the air to fuel ratio favors air by 14x. Therefore, an engine must be...
VIEW MORE

Sponsored links