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Old June 2nd, 2020, 10:16   #12
Certified Volkswagen Nut Vendor
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Join Date: Dec 2001
Location: outside St Louis (where it's safe)
Fuel Economy: fantastic

You can work the VNT actuator with VCDS in the Basic Settings. This is the quickest, easiest, least troublesome way. And on the BHW, it is super easy to actually SEE it from above. That is how you check the control side vacuum. It takes 20 seconds.

If you do not have the correct scan tool, get one. You'll be way ahead.

I use a smoke machine to check for boost leaks, although in some cases the smoke machine's meager 3 PSI or so simply is not enough to reveal one that perhaps "opens" when under major boost, like a split in one of the charge air hoses. But it makes quick work of finding leaking quick connects, be it from the tabs being worn through (especially common on the BHW's 'S' shaped hose off the turbo) as well as the seal rings on all the connections, and the all-too-common damaged from a crash cracks in the intercooler.
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