Uneven idle speed on the AXR engine

Hello!

'Since today, I'm experiencing a problem with my Polo TDI with an AXR engine: it runs unevenly when idling, and this is being transmitted to the interior as a shaking sensation.'
Otherwise, everything is fine; it runs normally and doesn't misfire while driving.

I've already used VAG-Com to read the error memory, but there's nothing stored in it.

What could that be?

Thank you.

Have you looked at the idle speed control system?

A friend of mine once replaced two PD elements at a workshop, but they only realized that the dual-mass flywheel was damaged after the fact.

Luckily, the workshop covered the costs.

m;

Okay, the idle-sleep regulation values seem normal; all four are moving between -1 and .

I just did a 0 to 100 km/h test for fun, and the stated time for my Polo is 10.7 seconds, but it actually takes me over 13 seconds.

Could it be the LLM?

I've also already tested the LMM values using VAG-Com, and they seem to be normal. The idle speed is around 300 RPM, and the full throttle speed is around 900 RPM.

If the mass airflow sensor (MAF) consistently reads above 900 when the engine is at full throttle, it doesn't necessarily mean it's broken.

Does he *really* always bring so much? I have only seen the LMM (likely meaning "leakage mass flow") drop below 3000 so far!

"Besides, recently while driving a 110 (ASV), I had a problem with the mass airflow sensor (MAF). There was a leak, which occasionally caused the airflow to drop to 0 mg, making the car feel like it was jumping around like a kangaroo!"

Can you please post a log of your LMM values?

m;

Hi,

Please perform Ulf's permeability test (-> see the relevant article). That's much more descriptive than just saying "0 to 100," because I doubt you managed to perfectly control the car and drive right on the edge of spinning out, etc.

Best regards,

Jan.

Okay, I'm going to run a stress test now and create a log file.
I was just on the highway, and it's only going 180 km/h.

Coincidentally, a Polo TDI with 75 horsepower was behind me, and I couldn't shake it off .

Something's not right.

Okay, I've recorded a log file now.

Someone really needs to check if everything is correct.
http://home.arcor.de/chris_kern/LOG-01-008-010-011.CSV{MARKER}

I also had the same problem with my AXR and the stuttering when idling. My workshop has replaced almost everything that could be the cause: all the glow plugs, the engine control unit, and they cleaned the AGR valve...

Occasionally, it still vibrates just a tiny bit when it's standing still. Replacing the engine control unit made the most difference; however, it's a known issue with VW.

Regards,
VipViper2000

ckone wrote:

Okay, I've now recorded a log file. Someone really needs to check if everything is correct. [url][/url] Hi, Honestly, my eyes hurt when I try to decipher that. If you create a .xls file and copy the .csv data into it using the "Paste Values" function, the overall appearance will be significantly more readable. And if you then write about what is actually listed in each column (-> technical article about target values

), you would probably also get serious answers .

Don't take this personally, but if you're expecting help, it's my opinion that you should make things reasonably easy for the people who are helping you.8)http://home.arcor.de/chris_kern/LOG-01-008-010-011.CSV{MARKER}{MARKER}

Okay everyone, problem solved. I replaced the diesel filter today, and it seems it was completely blocked.

The jerking is gone, and it's pulling normally again .

Thank you very much, everyone.

ckone wrote:

So guys, it's all sorted out, I replaced the diesel filter today, and it seems it was completely blocked. The jerking is gone, and it's pulling normally again

.
Hi,

It's already a positive thing that you're telling us the solution - but I (or we?) would also be interested in the story of your diesel filter: its age, mileage, and whether it was operated with biodiesel (possibly mixed with conventional diesel)?

Hi Ulf!

Okay, the mileage is 56,000 km, and it's been in use for exactly 2 years and 5 months.

I have never filled up with biodiesel .

I've always used regular diesel, mostly from Aral.

ckone wrote:

So, the mileage is 56,000 km, and it has been in use for exactly 2 years and 5 months. I have never filled up with biodiesel

.
Hi,

Well, with a recommended service interval of 30,000 km (does that apply to yours?), and therefore almost a 100% "extension" of the replacement interval, it's quite possible that the thing is already clogged.