Intake manifold Vacuum locations?

[Kurt Sampara]

Hello All,
I am trying to trace down my secondary air emissions system. Where does that small vacuum line enter the manifold? I have replaced all other lines but the one with the one-way check valve seems to disappear into the bowels under the manifold. Anywhere I can get a good picture of the manifold from underneath? The car is an E36 M52.
Thank you, Kurt.

[Jeron]

On the S52, that line goes to a VSV (vac switching valve) that is mounted under the intake manifold behind the oil filter.

[Kurt Sampara]

I found that valve with the two lines on it. One side goes to the exhaust (vacuum line with blue stripe) and the other (vacuum line with white stripe) leads straight down? I can see a white check valve on it but it is stuck near the engine mount, and I can't pull it up. This line is suppose to lead to the intake manifold am I correct? Is it suppose to attach in the intake manifold near the throttle? I can't get a good picture to see where it belongs. I don't know if it is suppose to lead down there or it fell off and got lodged down there?
Thanks, Kurt.

[Jeron]

So the white stripe line is disconnected? I think it connects to the intake manifold from below just behind the throttle body. There are two small lines there that simply friction fit to the manifold.

[Kurt Sampara]

The line must be attached because it still has vacuum. I have just fixed the problem by bypassing the secondary air pump. I purchased a secondary air pump simulator from Active Auto Werke. It is a small black box which is almost a plug and play system which tricks the computer that the secondary air pump is working. I was able to remove the pump and hardware completely. So far so good. No check engine lights or fault codes. Much cheaper than replacing the pump and valve. Also loses weight and opens space under hood. Thanks for all the advice, Kurt.