High fuel consumption (approx. 8 liters) on ALH TDI engine

Hello everyone.

"Over the past few days, my fuel consumption with my ALH 66kW TDI has been around 7.5 or more per 100 kilometers, even when driving normally!"

I just logged another normal trip, and I noticed that some rather strange things seem to be happening in measurement block 8.

http://home.arcor.de/benny222/testdrive!.xls


Here, the values for channels 2, 3, and 4 seem a bit strange! What's also worth mentioning is that I have a chip from Sorg installed.

Perhaps someone can analyze the data from the other logged measurement blocks (3 and 11) and give me a clue as to what problem my car might have.

Thank you very much in advance!


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Hi,

I have several comments right away:
For a good error analysis, it is more useful to record a full-load acceleration of 1500-4000 RPM in the highest gear than to simply log "normal driving."
To reach as many people as possible, you should put the relevant sections into a chart so that everyone doesn't have to struggle through columns of numbers.
What do you find strange about the MWB 8?

The only thing that strikes me upon a quick review is that the chip seems to limit the fuel injection amount when crossing the Russian border (lines 90-9.
Option A: The flow rate isn't providing enough material, but the Russian limit shouldn't be consistently at 47.6 in that case. However, the actual flow rate values contradict this.
Option B: A chip that isn't quite as cleverly programmed.

I don't foresee any power consumption issues at this stage, but perhaps we should investigate further with a graphical representation and a full-load acceleration test.

Sorry for the possibly somewhat blunt tone; it's not meant to be personal.

Regards,
Sure.

Here is the translation of the text from German to English:

"Guste" means "gust" in English. It refers to a sudden and strong gust of wind.

Hello Guste,

Thank you very much for your answer . As you may have noticed, I am not necessarily as knowledgeable in this area as some others here. No problem about the tone - I didn't misunderstand it...

1. I've done another run here with several full-throttle accelerations - the Excel table is here: http://home.arcor.de/benny222/testdrive2-volllast.xls

2. Das mit den Diagrammen ist halt so ne sache- jeder hat hier ja andere Präferenzen für die Darstellung, und da ich nicht wirklich Ahnung von diesem Thema habe, kann ich leider auch nicht die Relevanten passagen selektieren bzw. eine geeignete Darstellung wählen - wäre natürlich nett, wenn Ihr mir dennoch weiterhelfen würdet!

3. If I compare the target data from here: http://www.dieselschrauber.de/Solldaten_4_Zylinder_VE.html with my own data, mine are not within the range specified in MWB 8 2/3/4 - or am I misunderstanding something!?

Regarding the chip: I've had it installed for about 80,000 km now – without any issues whatsoever – so I don't really think it's the cause of the problem.


4. Thank you in any case!

Regards,
Benny.