P1345, P1348
 

Hi, I've read through the threads on P1345 and P1348 but never seem to see a resolution. Here is my situation: I get P1345 instantly and when I clear it I get it again within 30 seconds. I only get P1348 when I drive the X5. (3.0i, 2003) above 40mph.
So far I have changed the spark plug (#2 from the front) and the coil (#2 from the front). I have also removed and checked the intake boot for leaks (while doing this I cleaned the IAC). I also cleaned the MAF. When I remove the engine oil cap it only has normal (minimal) vacuum).
Any advise on what is wrong with my X5?
Symptoms are that the X5 pulses or surges when idling (or in park). It runs rough. It has lower power than usual when going up slight hills.

Hi, I wanted to add some detail. Spark plug #2 keeps getting fouled with oil (on the spark end of the plug, not the coil end of the plug). Does this mean I somehow have oil getting into the cylinder?

Fuel injector bad?
Swap coil and spark plug wirh another cylinder, if probem doesnt follow the coil/plug than swap the injector

U sure its oil?

Thank you! I think you may both be correct - CCV and/or Fuel Injector.
I noticed that there is a BMW service center in San Diego with high recommendations on Xoutpost, so I'm going to take the car there (CCV replacement would take me too long to do myself -maybe a week).

Here are pictures of my exhaust showing that liquid is spritzing out.

One more photo - driver's side

You will more than likely have to replace the VCG after you do the CCV.

If you are taking it into a shop, I would consider having them check the compression and do a leak down test. I think the combination of oil on the plug and black ooze in the exhaust can easily be bad valve seals or worn rings.

Reference (starting point) - trial and error to isolate the root cause

Exhaust Color Diagnosis | White Smoke Blue Black

Also,

See - The Top 7 Reasons Your BMW's Check Engine Light is On

Black Exhaust Smoke
If you find your tailpipe pouring thick black exhaust smoke it means that your engine is burning too much gasoline. This can be caused by several different problems, one of the most common being a clogged air filter. If the air filter becomes clogged it will not allow for the proper air and fuel mixture to be created that your engine needs to run smoothly. The engine will compensate by burning additional gasoline to make up for the lack of oxygen. This is called running rich, and not only greatly reduces your fuel efficiency but can cause numerous other issues for your vehicle's motor.

White Exhaust Smoke
If coolant is being burnt up within the engine it will be noticeable because of the white smoke that comes out of the tailpipe. A coolant leak can be disastrous for an engine because it means that the cooling system won't be able to properly do its job and the engine may quickly overheat. Overheating can lead to a wide array of problems, including blown head gaskets and cracked engine blocks. To avoid these expensive problems get to a repair shop as soon as you suspect some sort of trouble. The smoke will often be accompanied by low levels of coolant, so be sure to check when your vehicle's engine is cool.

Blue Exhaust Smoke
When you burn oil it burns with blue smoke. So if you find blue exhaust fumes coming out of the tailpipe it means that there is an oil leak inside the engine that is allowing the oil to be cooked in the combustion chamber. This puts your motor at great risk of improper lubrication which can lead to harsh metal on metal contact. This will result in the need for major repairs or possibly an engine replacement.

- See more at: What Does Colorful Exhaust Smoke Mean? - Lone Star Bavarian Blog