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Trouble codes Engine bank 1 & 2 lean and also sometimes cylinder misfire

Tiny
ROADDOG256
  • MEMBER
  • 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 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Tuesday, January 3rd, 2012 AT 3:30 PM
Tiny
ROADDOG256
  • MEMBER
  • 3 POSTS
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
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Tuesday, January 3rd, 2012 AT 4:45 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Carnoned-up-means the fuel condition is too rich-
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Tuesday, January 3rd, 2012 AT 9:18 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Inspect the intake boot for tears or holes and consider that the factory recommends replacement of the oxygen sensors (pre-cat) at 100k
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Wednesday, January 11th, 2012 AT 3:25 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
May also need software upgrading.
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-1
Friday, January 13th, 2012 AT 3:40 AM
Tiny
ROADDOG256
  • MEMBER
  • 3 POSTS
How do I get a software upgrade? I found the problem it was a tear is the oil dipstick vacuum hose.
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Friday, January 13th, 2012 AT 2:39 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Clear the faults and thats it.
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Wednesday, January 18th, 2012 AT 1:29 AM

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