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

2001 BMW 325i

Tiny

roaddog256

January, 3, 2012 AT 2:34 PM

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

7 Answers

Tiny

rasmataz

January, 3, 2012 AT 3:30 PM

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.

Tiny

roaddog256

January, 3, 2012 AT 4:45 PM

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

Tiny

rasmataz

January, 3, 2012 AT 9:18 PM

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

Tiny

Dr. Hagerty

January, 11, 2012 AT 3:25 AM

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

Tiny

Dr. Hagerty

January, 13, 2012 AT 3:40 AM

May also need software upgrading.

Tiny

roaddog256

January, 13, 2012 AT 2:39 PM

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

Tiny

Dr. Hagerty

January, 18, 2012 AT 1:29 AM

Clear the faults and thats it.

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