DieselKid

Like the title states, is there any way to read boost pressure with Vag-Com?

XCLR8TT

Yes, but if I recall correctly it isn't a true reading.

DumpTTruck

VAGCOM has a calculated number.

TTBlack

<ul><li><a href="https://forums.audiworld.com/tt/msgs/1822219.phtml">The Dr. explains..</a></li></ul>

TTschwing

VAG will measure Command (what the ECU wants), IC (MAP sensor or what it's actually getting) and Manifold (a not real calculated number from the MAF). There is also a limitation of 2550 milibars (22.5 PSI) from the MAP sensor reading.. Real and true pressure at the intake manifold can only be measured by a gauge...

For instance...Here's a baseline on a moderately modded car (Mine at the time):
<img src="http://images25.fotki.com/v898/photos/7/7305/130918/pressures-vi.jpg">

Removing the MAF screens returns this data...see how the calculation varies the manifold pressure readings? This was not a real boost increase, but rather a flow increase that skewed the numbers.. What you see is not always what you get in other words...

Oh yeah, it measures in Milibars...Subtract 1000 or your actual atmospheric pressure to interpret in Bar..(1 Bar = 14.5 PSI)
<img src="http://images30.fotki.com/v477/photos/7/7305/130918/MAFscreenout-vi.jpg">