Zu geringer Ladedruck | Posts 16+

14-09-2005, 18:17 Subject:

Quote:

By the way, I just fixed our Ibiza, which was also barely building any boost at low RPM.

Hello,

Then you can retake the initial assessment test in Block 11 with the midwife.
It should be better now...

14-09-2005, 18:28 Subject:

Roger wrote:

then you can retake the baseline test in Block 11 with the Ibi.
It should now be better...

*gg* I've been waiting for that.

But I'm also interested in it myself, and I'll look into it again in the next few days.

15-09-2005, 11:08 Subject:

Hello everyone!

I tested it out with my A3. The GT1749V turbocharger already produces a quite significant pressure difference at 903 RPM (idle speed).

TV 99.9%: 989 mbar.
TV 24/7: 1040 mbar.

It's a shame that VAG-COM doesn't automatically switch between the two key ratios.

Regards,
Alex.

15-09-2005, 11:15 Subject:

donalexo wrote:

It's a shame that VAG-COM doesn't automatically switch between the two key ratios.

That's exactly the joke about the default setting... or how do you mean that now?

Translated on 01-09-2026, 17:03.

Hello fellow mechanics!

I checked my turbo using a diagnostic tool, and I noticed that the boost pressure increases very slowly in the lower RPM range. I don't reach full boost pressure until 2500 RPM. Consequently, the duty cycle is also low.
Actually, the boost pressure regulator shouldn't have any malfunctions because the MSG selects the duty cycle based on other references, right?

Translated on 01-09-2026, 17:04.

Bertl100 wrote:

I've noticed that the boost pressure increases much too slowly in the lower RPM range...

The duty cycle is correspondingly low.
Actually, the boost pressure regulator shouldn't have any malfunctions because the MSG selects the duty cycle based on other references, or does it?}
Das TV sollte man besser "auf dem Kopf" betrachten: kleine %-Werte bedeuten "max. "Boost pressure"
Therefore, your MSG is reacting correctly.