Need help figuring out hoses on back of engine

[Crowz]

I did the smoke test on my 2001 X5 3.0 today and the valve cover is leaking in two places so I ordered a new gasket for that.

But there was also smoke coming from behind the engine between the intake and the firewall.

I put my cell phone back there and found this.

[Crowz]

The two pictures showing a single grey hose are what I could put my finger on laying across the motor. I cant get to the other hose in the 3rd picture that's darker looking.

The light grey hose did not have vacuum on it with the motor running. The dark hose I cant tell if it has vacuum as I couldn't reach it.

Is something missing that goes between these two hoses?

[Crowz]

Could it be for the air pump? The yellow hoses in this picture sure look to be in the right area.

[Zulu95]

What diameter are the hoses? When I had part of the SA vacuum hose replaced it took standard hose I got in O'Reilly.It should be throwing codes if the hoses are open. My hose dissolved into mush in one of the runs.

[Crowz]

I think I found it.

https://www.youtube.com/watch?v=QiqUAF0zxCk

Go to this guys video at 11:23

It shows the hose I think. From what I can see there Im missing the check valve and the rest of the hose that goes back around to the manifold on the drivers side.

I will try to compare it to the wifes X5 when she gets home to see for sure.

Its a small diameter hose aka standard vacuum line size.

[Crowz]

Using that diagram above the yellow hose part labeled 7 and the check valve labeled 6 is what I think Im missing.

[Zulu95]

They must have fooled the computer to stop it from throwing codes. Do a search for any threads suggesting bypass devices and see if they are fitted. If the car drives OK and is not throwing codes let it go.

[Crowz]

Ok after studying my own pictures I thought I had the phone flipped around.

But pic 1 and 2 are the two ends not the same hose from different angles. Both are grey. All Im missing I think is the check valve that goes between those two hose ends.

[Crowz]

Its throwing codes and runs rough when I first crank it. Smooths out pretty well after it runs for a bit.

I cant remember what codes its setting. I was just doing the smoke test today and didn't bother checking them at the time.

[Crowz]

Wife should be pulling up any minute. Now Im curious to see what the camera shows shooting pics in the same spot on her x5.