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Discussion Starter #1
Hi everyone,

I just purchased a 2014 BMW X3 35i three months ago.

Ive been having an odd issue with the car over the past few weeks.

On startup it will rev very high for 30 seconds or so, and as the RPMs drop to the normal idle the car will sometimes stall out and I have to restart the car. Or if it put it into gear, the car will rough idle and jump a bit.

Ive also noticed that sometimes there is decent power, and sometimes its like its lost some power when accelerating from a stop.

Lastly I also noticed when accelerating slowly or decelerating slowly there is a whistling noise. I know the car has twin turbo, but im not pressing the gas hard. An example would be when going very slow through a parking lot. You can hear the whistling spin up and then down. This is very noticeable noise that was not there before. It sounds very much like the turbo but I dont think the turbo should be spinning up that much so soon?

When the car was stalling i'd get a CEL light and the codes
P00BD and P1020(01)

The car seemed to drive better with the MAF unplugged so I changed out the MAF sensor. But im still having issues.

Does anyone have any ideas? Ive read it could be a leak/vacuum issue. Someone said check the intake boot/elbow? But I cant find anywhere online where this party may be?

Thank you in advance.
 

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I recall reading somewhere in this forum that your symptoms could be indicative of a pending turbocharger failure.
 

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Could be CCV in the valve cover. Whistling noise is one indicator. With the engine running, try to remove the oil filler cap. If there is heavy suction (hard to pull the cap off), then there***8217;s a good chance the valve has failed. Aside from a jury rig fix with a Russian part off eBay, the only proper way to replace the valve is to replace the valve cover.
 

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Discussion Starter #4
I did try the oil cap thing and the suction was not that bad.

The codes stopped after I changed the MAF sensor.

I took the car to the dealer and they found a cracked seal on the charge pipe after they did a smoke test.

Thanks everyone for the help/suggestions.
 
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