A6 4B 2.5 TDI AGR limit exceeded

15-10-2009, 1:43 Subject: A6 4B 2.5 TDI AGR limit exceeded

Hello, I did a engine swap on an Audi A6 2.5TDi, year 07/2003, from a BDG to an AYM engine, and the fuel injection pump worked fine

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"I've only just exceeded the EGR valve regulation limit. How can I fix this? Or does the BDG model have a different EGR valve?" Can anything be recoded there?
Best regards, Janek.

15-10-2009, 12:49 Subject: A6 4B 2.5 TDI AGR limit exceeded

The BDG (likely referring to a specific engine component) has a cooled EGR (Exhaust Gas Recirculation) system and a throttle valve to increase the EGR rate when necessary. Do you still have the BDG control unit installed?

15-10-2009, 12:56 Subject: A6 4B 2.5 TDI AGR limit exceeded

Okay, the BDG engine control unit is installed, and I also have the throttle body from the BDG engine.

15-10-2009, 13:04 Subject: A6 4B 2.5 TDI AGR limit exceeded

Okay, the BDG engine control unit is installed, and I also have the throttle body from the BDG engine.

16-10-2009, 11:22 Subject: A6 4B 2.5 TDI AGR limit exceeded

Please measure the MWB 3, both with and without the EGR system activated, and check if the readings are reasonable.