N63 mixture control

[bmwpower603]

I recently purchased a 2014 x5 50i m sport.

And I am trying to track down the issue. I’m getting the mixture control deviation to rich. I did notice today that when sitting stationary I can kind of smell fumes. (As I did with my s63 x5 m) Sometimes if I sit and let it idle a while, a Puff of smoke comes out after taking off.

I did some investigating. And saw that the intake pipes were cracked. So I replaced those. And still have the code.

Could this be related to the airbag light and electrical?

Could this be the oil return lines under the turbos clogged up?

[bmwpower603]

[bmwpower603]

Solved

Replaced both HPFP.

[Chilled]

How did you end up landing on the HPFPs? What else did you try?

[bmwpower603]

I popped the drain plug. And it (the oil) smelled like gas.

And my friend who is a master tech at BMW said it’s common. And since it is “mixture control” that is coming up for a code. Which relates to the HPFPs themselves.

The mixture control can also be related to injectors. And Low pressure fuel pump.

I counted both of those out of carrying out the bmw diagnostic step by step test plan for each fault entered.