TROUBLE CODES ENGINE BANK 1 & 2 LEAN AND ALSO SOMETIMES CYLINDER MISFIRE

  • Tiny
  • roaddog256
  • 2001 BMW 325i
  • 108,000 miles

I have changed out the fuel filter and checked for vacuum leaks not sure what to do next.

Tuesday, January 3rd, 2012 AT 2:34 PM

7 Answers

  • Tiny
  • rasmataz
  • Member

Could be 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
Tuesday, January 3rd, 2012 AT 3:30 PM
  • Tiny
  • roaddog256
  • Member

I also forgot to tell you I removed all of the spark plgs one at a time and 4 of them looked good but the last two had black spots instead of that gray color, /what does that mean

Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 4:45 PM
  • Tiny
  • rasmataz
  • Member

Carnoned-up-means the fuel condition is too rich-

Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2012 AT 9:18 PM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

Inspect the intake boot for tears or holes and consider that the factory recommends replacement of the oxygen sensors (pre-cat) at 100k

Was this
answer
helpful?
Yes
No
Wednesday, January 11th, 2012 AT 3:25 AM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

May also need software upgrading.

Was this
answer
helpful?
Yes
No
Friday, January 13th, 2012 AT 3:40 AM
  • Tiny
  • roaddog256
  • Member

How do I get a software upgrade? I found the problem it was a tear is the oil dipstick vacuum hose.

Was this
answer
helpful?
Yes
No
Friday, January 13th, 2012 AT 2:39 PM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

Clear the faults and thats it.

Was this
answer
helpful?
Yes
No
Wednesday, January 18th, 2012 AT 1:29 AM

Please login or register to post a reply.

Similar Questions