Log File Analysis: Insights and Optimization

Could someone please analyze my log?

"I'm experiencing an issue where, after the engine warms up, there's sometimes a slight hesitation or jerking when driving on the highway and then stopping at traffic lights. Also, the ESP (Electronic Stability Program) light sometimes comes on after the engine starts. This light is also related to the pump-injector elements. About a year ago, after the ESP light came on, I received an error message indicating that a pump-injector element was faulty. I cleaned the contacts on the injectors (specifically on the 038 971 600 adapter wiring harness for the injectors) and bent them slightly, and it was quiet for a while, but now the light is on again sometimes."


This morning, I went geocaching (I logged finds for caches 8 and 10).

I've actually already tried to filter the display to show only the most important things. However, when I do that, I can't seem to get KDataScope to display my values anymore.

Okay, the jerking happened again today, and I noticed that you can tell a lot about it by observing the engine speed. This morning, I drove a bit in city traffic, then onto the highway. After the train crossing, I had to stop at three traffic lights before the jerking started (traffic light n=903 rpm). After the third traffic light, I think that's when the jerking first occurred.


P.S. I hope this can be seen in the context of the speed (I have no idea about that).

I can only imagine that:
1. The adapter hose set for the fuel injector is defective. (Part number: 038 971 600)
2. the mass airflow sensor (MAF) is defective. (part number: 038 906 461 C)
3. The worst-case scenario is a faulty or blocked injector nozzle.

Log files

Vehicle: Golf IV Highline.
Year of construction: 2001.
Engine: 116 hp TDI.
MKB: AJM

Today I installed a new adapter wiring harness because the fuel injector was defective. (Part number: 038 971 600)

During my test drive, it didn't exhibit any wheel hop (but that doesn't always happen).



I then floored the accelerator from around 30 km/h and noticed that it also had a kind of slight hesitation. It feels like I'm momentarily lifting off the gas and then immediately pressing it back down, over and over again.



Just read the error codes again, and there are no errors, neither under the engine nor under ABS/brakes. (Is it normal that when I read the ABS, only the ABS and handbrake lights blink? It's only when I disconnect again that the ESP light also comes on! Can anyone confirm this?)



As far as I can tell right now, the problem is likely with the mass airflow sensor (MAF). It's probably the original one, and I've already driven over 130,000 kilometers.

What is the price of the 038 906 461 C mass airflow sensor? Around 100 euros? Are there any drawbacks to using a Bosch mass airflow sensor? Is it around 80 euros?

Gyros-das-Virus wrote:

Is it actually normal that when I read the ABS code, only the ABS and parking brake lights blink? Only when I disconnect again does the ESP light also start blinking! Can anyone confirm this?

It's normal. Because the ABS control unit considers it an error when using VAG-COM.