As part of the trouble shooting (reduced power), I am sure checking the vacuum (potential leak?) is one of the first things.

I have a handheld pump/gauge unit (Autozone).

Can someone instruct me where to hook it up?
I have read somewhere that I should expect 18 or so inHG?

Thanks.

 

Make a T connector like this guy here, pict. 14
http://www.ray-cuthbert.com/audi/how...oam/2009_10_19

and attach it to the intake manifold blue hose (ref. this link) on the front of the engine block (like in pic. 6). Connect your vacuum gauge to the T and start the engine. Let it run for 5-10 min, it slowly build vacuum and mine is at about -18" when hot.

 

^^great info

 

A boost gauge should be one of the 1st mods anyone with a turbo car should do.

 

It is going to be ordered soon; need to decide on style and location (behind the steering wheel or pillar pod).

Can I splice a pressure gauge temporarily in (for example with a T) somewhere convenient in the engine bay?

 

The vac line nipple near the front of the intake manifold should work. Thats where I tapped for my gauge.

 

This one?

 

either one will work, I personally used the one the nearest the front of the car.

 

Hooked it up today. With warm engine: -20 inHG idle, steady. So I am good on the vacuum side, no leaks, right?

 

Ya thats where it should be