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AVF Idle Speed Control - Cylinder 3

 
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yanliz



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2004 Audi A4 Avant
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Post26-06-2010, 1:32    Subject: AVF Idle Speed Control - Cylinder 3 Quote

Good evening.

Either the search function isn't working, or I'm too stupid to use it... anyway, I always get an error message.
I would actually just like to ask if, based on your experiences, I should be concerned about the slow pressure drop in the 3rd cylinder. The value remains almost constantly between +0.30 and +0.40. Apparently, the 2nd cylinder is compensating for this, and it remains at the same value but in the negative range.
Should I get the valve timing and PDE checked, or should I just leave it alone as long as the engine is running?
Audi A4 Avant 1.9TDI MJ2004
MKB: AVF, GKB: HCF 6-Gang


Translated on 18-09-2026, 13:57.
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Steffen W
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Post26-06-2010, 5:52    Subject: AVF Idle Speed Control - Cylinder 3 Quote

Leave it like that. That's perfectly fine.
Passat Variant BGW 2005
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Translated on 18-09-2026, 13:58.
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yanliz



Joined: 01/01/2009
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Location: Essen
2004 Audi A4 Avant
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Post26-06-2010, 10:46    Subject: AVF Idle Speed Control - Cylinder 3 Quote

Ok. Thank you.

I have a question about air mass and boost pressure overshoots. Last night, I logged data from measurement blocks 3, 6, and 11. The measurements were taken under full load in 4th gear, followed by a brief period in 5th gear.
Are the values okay?
Audi A4 Avant 1.9TDI MJ2004
MKB: AVF, GKB: HCF 6-Gang


Translated on 18-09-2026, 13:58.
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yanliz



Joined: 01/01/2009
Posts: 15
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Location: Essen
2004 Audi A4 Avant
Free account, no CAN development support

Post29-06-2010, 19:57    Subject: AVF Idle Speed Control - Cylinder 3 Quote

Please let me know if the logs are incorrect! Or why doesn't anyone want to respond...?
Audi A4 Avant 1.9TDI MJ2004
MKB: AVF, GKB: HCF 6-Gang


Translated on 18-09-2026, 13:59.
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dieselschrauber
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Post29-06-2010, 22:06    Subject: AVF Idle Speed Control - Cylinder 3 Quote

Perhaps because it's been asked a thousand times already, and there's more than enough information to be found using the search function and in the specialized articles?


Translated on 18-09-2026, 13:59.
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