Audi A4 B7: 2.5 TDI Issue Above 2500 RPM

Hello,

ich habe passend zu Wochenende ein Problem mit meinem A4. Und zwar bockt (wie Notlaufprog.) der wenn ich beschleunige ab 2500-3000rpm und qualmt kurze Zeit später stark weis/blau. In allen Gängen! INot when idling.

Data: Audi A4 2.5 TDI, manufactured in November 2005, engine codes BDG/HSL, approximately 130,000 km mileage.

'If I always take my foot off the gas after the engine starts to buck and then drive below 2500 rpm, I don't have any errors in the MSG (presumably a vehicle control unit). However, if I accelerate very slowly, I reach over 3000-4500 rpm, and that's when the ESP light starts flashing briefly, and sometimes it stays on permanently. The following error codes then appear:'

Addresse 01: Motor
Steuergerät-Teilenummer: 8E0 907 401 AF
Bauteil und/oder Version: 2.5l V6 TDI G000SG 0060
Codierung: 02002
Betriebsnummer: WSC 06325
Erweiterte Informationen: WAUZZZ8E36Axxxxxx AUX6Z0Exxxxxxx
2 Fehlercodes gefunden:

00550 - Spritzbeginnregelung
17-10 - Regeldifferenz - Sporadisch
17583 - Voreinspritzung abgeschaltet
P1175 - 35-00 - -

Readiness: 0 0 X X 1

oder nur

00550 - Spritzbeginnregelung
17-00 - Regeldifferenz


Does anyone have any idea what this is?

Okay, and one more thing: I briefly disconnected the positive terminal of the battery shortly before the error first occurred.

Regards,
Jackson.

Update: It's now difficult to start, and when it does run, it idles very erratically, stutters when I give it gas, and produces a lot of smoke. I can't get the RPM above 1000.

Okay, check the timing belts. If everything is fine there, I suspect either the fuel injection pump is faulty or the EGR valve might be stuck in the "open" position.

mserge wrote:

Hmm, check the timing belts; if everything is okay there, I suspect either the fuel injection pump is faulty or the EGR valve might be stuck in the "open" position.

"As mserge mentioned, be sure to check! Before you disassemble everything, see if there's a clear hose between the fuel line and the ESP unit, and look for any air bubbles."

Sounds like a bunch of hot air.
So, there's air in the fuel lines.
Is this a known issue with the 2.5 V6 TDI engine?
Here's the translation:

"There is an argument in favor of using a start-of-injection regulation difference because, with air in the diesel fuel, it can fluctuate between different control ranges."

Did you check the fuel lines for air bubbles?

Hello,

Thank you for the replies. I unfortunately didn't receive any email notifications, so I'm just reading this now.

There's a transparent diesel line at the pump, and I can't see any air bubbles in it.

Is there a way to check the timing belt (which hasn't been replaced yet) while it's still installed? Does the initial symptom (only starting to misfire abruptly at 2500-3000 rpm, not at idle) even align with a failing timing belt?

What is the best way to check if the AGR (Aktivkohlefilter) is functioning correctly?

Regards,
Jackson.

If you're experiencing issues with the injection start, I would first check the needle lift solenoid valve.

I might be able to get a used pump (to borrow for testing), but I've read that the water flow sensor (WFS) is integrated with my specific pump model (059 130 106 K).

Can I replace them without having to remove the entire front assembly?

Wie muß ich die Pumpe an mein MSG 'anlernen'`(VAG-COM vorhanden + 4 Stellige MSG PIN habe ich auch) ?

Gruß
Jackson

Jackson wrote:

Kann ich die überhaupt wechseln ohne die ganze Front abzubauen?

Wenn mans kann, ja.

Kann ich die überhaupt wechseln ohne die ganze Front abzubauen?
Wenn mans kann, ja.

Diese Aussage bringt ja wohl nicht viel, wenn du nicht verrätst wie! Da könnte ich auch sagen man kann die Pumpe selber reparieren wenn mans kann!

Naja, es geht halt. Muss man aber dünne Finger haben. Da gibts nix groß zu erklären, einfach alles ab machen, was ab muss.

Außerdem war deine Frage, ob man sie wechseln kann ohne die Front abzubauen. Diese Frage, hab ich dir doch mit "Ja" beantwortet, oder? Wenn du ne Anleitung willst, musst du auch nach einer Fragen.

Fehler war ein Mechanikdefekt der VP44, habe jetzt ne neue Pumpe drauf.

Wagen läuft wieder rund, geht aber nach 2 sec. aus Motorsteuergerät gesperrt (Wegfahrsprere).
Fehler: 17978 - Motorsteuergert gesperrt
P15701 - 35-00 - -

Habe die IMMO im MSG deaktiviert aber annscheinend ist das nur zw. KI und MSG
WFS blinkt auch nicht!

Wie kann ich die Pumpe (Buchstabe K) am Ende mit VAG-COM an mein MSG-Anlerenen?
4Stelliger Motorpin ist bekannt.

Gruß
Jackson

[Translating...]

http://wiki.ross-tech.com/wiki/index.php/Immobilizer_III_Injection_Pump_Swapping

Thank you for the quick response, it worked. The engine is currently warming up.