TDI Intermittent Power Loss: Audi A4 Troubleshooting

Hi, everything's clear.

The small leak that was causing the problem was a crack in the sealing gasket between the intake manifold and the intercooler piping.

The crack developed during the test drives and eventually started leaking oil.

Despite this, I have a few questions.

Is the logged engine performance data okay? I had a maximum boost pressure of 2350 millibars, but otherwise the pressure is regulated down to approximately 2000 millibars at full load. Does this seem okay? I would appreciate a final confirmation.

Secondly, shouldn't the significantly lower boost pressure trigger an error – specifically a boost pressure regulation fault? I never received any error messages.

Thank you to all F members.

Best regards, Frank.





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"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Gras. Es ist ein perfekter Tag für einen Spaziergang."

Hi,

"I've recently been experiencing occasional power loss during acceleration, particularly noticeable between 2000 and 3000 RPM."
(A4 B5, 110 hp TDI, AFN engine - everything is still original).

The following is happening quite suddenly:

Waste exhaust pressure.
Waste EGR 0%.
Waste air mass.
Waste injection rate.
Waste Throttle (Throttle for waste?)

(recorded using VAG COM)

As far as I can tell, everything happens simultaneously, it lasts for about 1-2 seconds, and then things return to normal. The car runs up to its maximum speed, and there are no error codes.

Das wohl das Gas zurückgeht, ist komisch. war auf einer konst. Acceleration.

Mileage: 170,000 km

Does anyone have any ideas?


Hello.