Trouble codes Engine bank 1 & 2 lean and also sometimes cylinder misfire
2001 BMW 325I
108,000 MILES
ROADDOG256
MEMBER
3 POSTS
I have changed out the fuel filter and checked for vacuum leaks not sure what to do next.
Jan 3, 2012 at 6:34 AM
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RASMATAZ
✓Experienced 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.
Jan 3, 2012 at 7:30 AM
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
Jan 3, 2012 at 8:45 AM
RASMATAZ
✓Experienced Mechanic
75,992 POSTS
Carnoned-up-means the fuel condition is too rich-
Jan 3, 2012 at 1:18 PM
DOCHAGERTY
✓Experienced Mechanic
9,606 POSTS
Inspect the intake boot for tears or holes and consider that the factory recommends replacement of the oxygen sensors (pre-cat) at 100k
Jan 10, 2012 at 7:25 PM
DOCHAGERTY
✓Experienced Mechanic
9,606 POSTS
May also need software upgrading.
Jan 12, 2012 at 7:40 PM
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.
Jan 13, 2012 at 6:39 AM
DOCHAGERTY
✓Experienced Mechanic
9,606 POSTS
Clear the faults and thats it.
Jan 17, 2012 at 5:29 PM
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