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

2001 BMW 325I
108,000 MILES
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ROADDOG256
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I have changed out the fuel filter and checked for vacuum leaks not sure what to do next.
Jan 3, 2012 at 2:34 PM
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RASMATAZ
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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.
Jan 3, 2012 at 3:30 PM
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ROADDOG256
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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
Jan 3, 2012 at 4:45 PM
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RASMATAZ
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Carnoned-up-means the fuel condition is too rich-
Jan 3, 2012 at 9:18 PM
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DOCHAGERTY
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Inspect the intake boot for tears or holes and consider that the factory recommends replacement of the oxygen sensors (pre-cat) at 100k
Jan 11, 2012 at 3:25 AM
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DOCHAGERTY
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May also need software upgrading.
Jan 13, 2012 at 3:40 AM
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ROADDOG256
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how do I get a software upgrade? I found the problem it was a tear is the oil dipstick vacuum hose.
Jan 13, 2012 at 2:39 PM
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DOCHAGERTY
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Clear the faults and thats it.
Jan 18, 2012 at 1:29 AM