Okay, I found that removing the air cleaner actually makes it pretty easy to see the terminating points of the lines. I could not reach them to remove if needed. But they are there and connected.

I found that if I rev the engine, I get momentary vacuum at the EZL. Is brief and doe not hold when holding RPM.

There is no vacuum amp on my car (90). Not sure if it ever had one. I doubt it. This port (purple line at throttle body) is capped with a closed black tube.

The red line on my car and the orange line appear to be swapped at the manifold side.

The orange line goes directly to the EZL module. No thermo valve, check valve, etc. Just a direct line.

The red line I think is the vertical port on the intake manifold itself. On my car this line is the black tube with white line. Its larger than the rest and goes direct to the purge valve.

So it seems these are swapped. But this seems like it would be hard to accidentally do. Also the lines do not seem to "fit". The large black line with white stripe used for purge seems to big to be used for the EZL and it seems too large to be attach to the throttle body.

So could anyone verify the purge line? Is it a larger black line with white stripe? Pretty sure that is correct, but does yours terminate on top the manifold or appear to feed from under the intake and close to the TB?

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car