Volkswagen Golf 4 1.8T AUM, engine occasionally lacks power

Hello, I'm new and don't have much experience.
I have VCDS and would like to know which Measurement Blocks (MB) I need to diagnose my problem.
to fix?

Oellappen wrote:

hello, I'm new and don't have much experience. I have VCDS and would like to know which Measurement Blocks (MB) I need to diagnose my problem. zu beheben?

First, we need a complete error scan of all ECUs, which you can configure here. Then, we can check the corresponding label file to see what needs to be logged or which data should be recorded.
We also need a more detailed description of the error.

Thank you for your quick response. The error memory is clear.
Everything is fine at the moment.
I've been experiencing this problem for several years. I've also tried using different tuners.
Berlin: Everything seemed fine at first, but then problems arose.
I've also had it repaired before, but the effect was only temporary.
Even the best students couldn't manage it. He thinks it might be a problem with the car?

Well, all these very precise details actually suggest that something might be wrong with the car.

The proposed suggestion should be implemented first. Enable Autoscan.

Then try to describe how your problem occurs, when it occurs, and exactly what steps were taken...

We don't know your car, and we also don't understand what you mean by "improvements" or "different tuners." If everyone has tinkered with it at some point, it will certainly be very difficult to help without knowing the exact history.

Here is my car scan report.

Saturday, December 20, 2014, 1:48:16 PM.
VCDS: A Windows-based VAG/VAS emulator.
VCDS version: RKS 12.12.3.0
Data as of: 20140904.


Vehicle Identification Number (VIN): WVWZZZ1JZ2P0470xx License plate: [Leave blank, as the license plate is missing]
Mileage: 85,150 km Repair order:

Vehicle type: 1J (1J - VW Golf/Bora IV (1998 > 2006))
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76

Vehicle Identification Number (VIN): WVWZZZ1JZ2P0470xx Mileage: 85,150 km
"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Feld und lässt das Gras sanft wiegen. Es ist ein wunderschöner Tag."

The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze blows through the field, causing the grass to sway softly. It's a beautiful day.
Address 01: Engine Control Module (ECM)
Label file: RKS\06A-906-032-AUM.lbl
Part number: 06A 906 032 HJ
Component: 1.8L R4/5VT 0003
Encoding: 11500
Operating number: WSC 12340
VCID: 6DD64A7427E8627640B-5156
WVWZZZ1JZ2P0470xx VWZ7Z0A4253175

No error codes found.
Readiness: 0000 0000

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Feld und lässt das Gras sanft wiegen. Es ist ein wunderschöner Tag."

The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze blows through the field, causing the grass to sway softly. It's a beautiful day.
Address 03: Brake Electronics; Label file: RKS\1C0-907-37x-ESP-F.lbl
Part number: 1C0 907 379 E.
Component: ESP FRONT MK60 0104
Encoding: 0019970
Operating number: WSC 00028 000 00000
VCID: 2C5087708C72AB7E175-5156

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Feld und lässt das Gras sanft wiegen. Es ist ein wunderschöner Tag."

The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze blows through the field, causing the grass to sway softly. It's a beautiful day.
Address 17: Control panel module
Label file: RKS\1J0-920-xx5-17.lbl
Part number: 1J0 920 826 A
Component: COMBINATION INSTRUMENT + SPEEDOMETER VDO V06
Encoding: 05112
Operating number: WSC 00000
VCID: 275A785CC5948826FA7-513A
WVWZZZ1JZ2P0470xx VWZ7Z0A4253175

No error codes found.

"Die Sonne scheint hell und warm. Die Vögel zwitschern fröhlich in den Bäumen. Ein leichter Wind weht durch das Feld und lässt das Gras sanft wiegen. Es ist ein wunderschöner Tag."

The sun is shining brightly and warmly. The birds are chirping happily in the trees. A gentle breeze blows through the field, causing the grass to sway softly. It's a beautiful day.
Address 19: Diagnostic interface
Label file: RKS\6N0-909-901-19.lbl
Part number: 6N0 909 901.
Component: Gateway <-> CAN bus 0001.
Encoding: 00006
Operating number: WSC 00028
VCID: F0E8D300B0DA0F9EEBD-513A

No error codes found.

Edit @Autoservice: VIN shortened and license plate removed.

Hello, so the following items were replaced:
LMM (Mass Air Flow sensor), ignition coils, and spark plugs.
Boost pressure sensor, blow-off valve (RS 4).
Intake air temperature sensor, temperature indicator sensor.
Fuel pump and regulator.
Boost pressure control valve.

After a highway drive, it accelerates really well, which means you need...
Just a light touch on the accelerator and it really takes off.
After a few days in the city, is that not the case anymore?

Oellappen wrote:

Hello, so the following items were replaced: LMM (Mass Air Flow sensor), ignition coils, and spark plugs. Boost pressure sensor, blow-off valve (RS 4). Intake air temperature sensor, temperature indicator sensor. Fuel pump and regulator. Boost pressure control valve. After a highway drive, it accelerates really well, which means you need... Just a light touch on the accelerator and it really takes off. Nach ein paar Tagen in der Stadt ist das nicht mehr so?

Typical case of a "mystery box" – you don't know which parts were installed, can't tell, or maybe you just don't want to say.
Did you just assign "tasks" without even being able to assess what "they" are actually doing?

Im Normalfall für solche Autos trifft, leider, alles drei zu und der Datensatz im Steuergerät passt auch nie zu dem ganzen Kram.

The worst thing is that, even if you educate yourself, you can never be sure that what was supposedly installed is actually what was installed.

First, take a look at the adaptation parameters of the lambda regulation and try to understand how the lambda regulation works.
Ich kann den Inhalt dieser URL nicht abrufen und übersetzen. Bitte gib mir den Text, den du übersetzt haben möchtest.

Best regards, Rainer.

Hello Rainer,
Thank you for your quick and honest response.
The accelerator pedal and throttle body (used) have been replaced.
What you don't know is that I replaced those parts.
Sure, here is the translation of the text from German to English:

"But not in this order as written."

Okay, I swapped around a lot of parts, but now I have VCDS from you.
Okay, I've been letting this problem linger, but now I want to address it.
pursue; follow; investigate; track down.
P.S. I used to be a car mechanic working on Volkswagen vehicles about 20 years ago.
Best regards, Peter.

Take a look at the air mass, fuel injection amount, and boost pressure when the problem occurs, and also when the engine is running normally.
Create a log for both cases and upload them; I'm sure you will then receive help from very knowledgeable people here.
Please take your time to read the forum rules and guidelines carefully; you're sure to have a lot of fun in this forum.

It's also typical of the average Volkswagen mechanic to freely exchange parts without proper assessment; it would be best to distance yourself from that kind of reputation.

Hello Klahaui,
Thank you for your answers and tips; I will implement them soon.
I only replaced the parts if there was a problem with them.
Now that I have VCDS, I can also check things before replacing parts.
I also went to Volkswagen and told them that the car sometimes lacks power.
Of course, you didn't find any errors.
That's why I'm asking for help, because I'm new to using VCDS.
Best regards, Peter.

Hello everyone.
I've used VCDS before and I once used measuring block 000 while the engine was idling and warmed up.
All values are okay except for number 5.
Throttle valve angle setpoint 1-10.
Measured 000.
Best regards, Peter.

Is your problem occurring when the engine is idling, or have I forgotten when an engine is supposed to produce power?
Rainer wrote to you explaining how you can find the cause of the problem, and I also sent you another message outlining how I would approach it.

It's certainly not fun for me to help you this way.

Peter, VCDS is a "measuring tool." As a technician, you are responsible for taking measurements and considering the results before and after, and that has always been the case and will continue to be.
You're experiencing an unclear power or torque issue with your car, and the only thing you know for sure is the difference in performance between highway driving and city driving.
So, in a gasoline engine like this one, something undesirable happens in the vicinity of the fuel injection, air intake, mixture formation, exhaust, ignition, or compression. This has always been the case, and it all plays a role here.
You must and can compare today's performance with past records to see when things are working properly and when they aren't. You need to take the measurements yourself.
See how the regulation works (see Rainer's answer above), there is literature available on the subject, and review the relevant measurement data.
A simple example: Target boost pressure vs. actual boost pressure (which may or may not be related to your problem).
hg
Herbert.

Hello Klahaui,
No, my problem isn't related to the idle speed. I only asked because...
It has been noticed. I have now reinstalled my old throttle body, and lo and behold...
The value is now back within the target range. Of course, I followed Rainer's suggestion. The values are okay.
Yesterday I noticed that cylinder 2 is misfiring in my engine (MWB 015).
Replaced the ignition coil for cylinder 1. The misfire has now moved to cylinder 1.
Used ignition coil installed, and no more misfires.
The glitches are very rare.
Today I checked for misfires and briefly detected a misfire on cylinders 1 and 2.
I'll probably replace the spark plugs next week; they're about 1.5 years old.
10,000 km mileage.
The intermittent issues were not stored in the error memory.
Best regards,
Peter

Hello Klahaui,
Here's a test run in second gear. There was no other way.

Okay, here's a test drive in third gear.