Possible Vacuum Leak

[OldManSupra]

So here's a link to the video of the car:
Engine Running Video

I'm assuming it's a vaccum leak, any input? Is it something that could damage my engine on a 3000km drive?

Here's a list of things that have been replaced:
intake manifold gasket was done
rocker cover gasket
fresh ct-26 turbo done by cherry turbos in st. thomas
oil return line upper and lower gaskets replaced
injector o-rings and grommets replaced
TPS sensor and throttlebody gasket replaced

[Supra_devil]

easiest way to find an air leak IMO, build a leak tester, remove the MAF sensor and pressurize the intake, you should be able to find the leak quick. i've done it for other guys and found injector seals leaking in seconds where they looked for hours to find the leak previously. found the leaks on the rx7 i had in seconds, where i couldn't find it for hours before that.

just a simple 3" pipe thats capped on one end, with an air fitting on it. put that where the maf sensor clamps on, pressurize it with 10-15psi and you should find the leak quickly if there is one.

[RaceBredMK2]

With engine running! You can use starting fluid or carb cleaner to narrow the search when looking for vac leaks. Atleast a general area to look if the motor idles up when spraying a certain vac line!

[OldManSupra]

Good solutions! I was wondering if an automotive stethoscope could be used to identify this noise as well? As the noise is probably coming from where it is leaking.

A few other question about it:

1. The EGR has also been removed from the car. The hoses on the top of the intake are rerouted into each other. Should they be capped off instead? This can be seen in the video above.

2. Could bad gaskets in the EGR block off plates cause such a noise?

[OldManSupra]

easiest way to find an air leak IMO, build a leak tester, remove the MAF sensor and pressurize the intake, you should be able to find the leak quick. i've done it for other guys and found injector seals leaking in seconds where they looked for hours to find the leak previously. found the leaks on the rx7 i had in seconds, where i couldn't find it for hours before that.

just a simple 3" pipe thats capped on one end, with an air fitting on it. put that where the maf sensor clamps on, pressurize it with 10-15psi and you should find the leak quickly if there is one.

With this method, after you get hook it up, you'll be able to find the leak just by listening and feeling around no other tools required?, or by spraying soap and water or carb cleaner around the hoses?

[OldManSupra]

Although not ideal think a machine like this would do the job? Cheap Air Compressor

[OldManSupra]

Also, I understand how to make the device at the AFM. However, do I just hook unhook the AFM plug in the device and blow the air in, or do I need to block it off at a certain point or disconnect any other hoses so I'm not damaging engine internals or sensors. Also will I need to block it off at another point so that the system will stay pressurized?