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View Full Version : Ross Tech Vag com utilized for boost



AudiNinja
03-30-2010, 10:48 AM
Is there a way to measure my cars vacuum/boost using the Hex can usb port ross tech vag com while driving?

I have been having trouble with my boost since i put the boost gauge in. Initial read was 10vac/5psi. I have been tightening connections for boost gauge and other vacuum lines. Current read 12vac/7psi. Is that right? I have read that it should be 22vac/10psi. I am going to do a boost leak test later this week. If the lines are fine and it tests good, what should I look at next? I have heard DV valves go out or get clogged or blow-offs bad? If I take the air box off will I have easy access to the turbo? Any other tips who be handy?

Thank you

dcampana
03-30-2010, 11:13 AM
op- is the ecu flashed/ chipped? if not, i think the stock boost is in the 7 to 8 lb mark.

IIRC, you are an AEB and no map sensor which means checkign boost on VAGcom is not an option....

AudiNinja
03-30-2010, 06:02 PM
Oh ok thanks. Not chipped.

Is that boost for just for speeds of 50 mph to 60 mph? or does it really matter. I went 80mph today... to see what happened to the boost and I peaked 10psi.

biketsai
03-30-2010, 06:04 PM
Log block 115

AudiNinja
03-30-2010, 06:04 PM
Oh ok thanks. Not chipped.

Is that boost for just for speeds of 50 mph to 60 mph? or does it really matter. I went 80mph today... to see what happened to the boost and I peaked 10psi, but usually its just 7psi in all the other gears.
What does that mean??? lol

AudiNinja
03-30-2010, 06:05 PM
Log Block 115?

walky_talky20
03-30-2010, 07:48 PM
Log block 115

Won't work. He's got a 98. ECU can't see boost pressure unless you are model year 2000 or 2001. Further, the map sensor on a B5 sees boost only. So it won't help him with the vacuum problem anyway, even if he did have one.

OP: your boost pressure looks pretty good. 7 psi is pretty much what you get on an AEB. Should have more vacuum, though. Look over all your vacuum lines. And look closely at the PCV system under the intake manifold.