130PS TDI Probleme! | Posts 16+

Thank you in advance!

Okay, regarding my attempts at repair.
First, I disassembled and cleaned the LMM (likely referring to a mass airflow sensor), but it didn't solve the problem.
Then I removed and cleaned the AGR valve, but that didn't work either.
I haven't done much else related to mechanical things.

I have the feeling that it has gotten worse since I cleaned the EGR valve, but I suppose there's not much you can do wrong when cleaning it.

I'll do some test runs tomorrow and then post the results online in a diagram. Should the diagram display both the target and actual values, or are the actual values sufficient for clarity?

And thank you again.

Edit:
As I mentioned, you could feel the turbocharger's boost starting around 2000 RPM. Now, you only feel it starting at 2600 RPM at the earliest, and sometimes it doesn't kick in at all. I experienced that once today!

I can only agree with what my predecessor said...

'The boost pressure looks good. However, your excerpt doesn't provide much information. If I understand correctly, you seem to be lacking power. And, of course, the logs are missing. Perhaps the 400 mbar at approximately 2200 RPM indicate a leak in the charge air system (including a faulty turbocharger), or a valve that isn't closing completely or is sticking, or a sticking variable valve timing (VVT) unit. But you should have been able to check all of this based on the technical articles you've read!'

edit: you were probably faster.
If the car runs worse after your EGR repair, then you probably did something wrong. The turbocharger should start building near maximum boost pressure around 1900 RPM. If it doesn't, it indicates one of the errors mentioned above.

But what could possibly go wrong there?
I loosened the 3 screws at the top and the two that connect to the exhaust manifold. I had already removed the hose beforehand. Then I removed the bulk of the material with a flathead screwdriver, and I cleaned the rest with brake cleaner. After that, I reassembled everything. But I'll start working on the missing logs tomorrow.
But thank you very much. This is already very helpful to me.