LMM Replacement AJM Engine: Diagnose Power Loss

Sure, here is the translation of the text from German to English:

'Re zu' translates to 'Regarding' or 'Concerning'.
Poor performance ==> not an LLM! (The quote button isn't working for some reason, always editing: Sorry)

Hello fellow DIY enthusiasts,

What has been (incredibly long!) will finally be good.

It's been a while since I last described a performance issue.

'Almost everything has been checked on our Passat Variant, PD 85 kW AJm (manufactured in 1999, 200 series model):'

- Altitude sensor control unit, vacuum, turbocharger, valves, mass airflow sensor, sensors...
Conclusion: Current mileage: approximately 118,000 kilometers.
Since the car was purchased, at a mileage of 22,000 km, there has been a loss of power. While an OBD tuning adjustment approximately 5,000 km ago significantly improved the situation, it still wasn't 'normal.'

After I don't know how many measurements in X workshops and various replacements of the mass airflow sensor (MAF).
Something has changed: The Exchange Interface Module (IIM) was reinstalled by us just a week ago.

Feedback regarding various inquiries about performance issues.

You won't believe this:

The device seems to be working for the first time!

'Because we also checked for things like cable breaks, reviewed LMM logs, etc. (while the engine was running at 3000 RPM), etc...'
If that happened, it would mean that the control system was useless, and the mass flow meters were always breaking.
(By the way, only the filter cartridge was replaced!)

The performance losses were also temperature-dependent and sporadic!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Okay, so the current power output is approximately 110 kW and 360 Nm. Unfortunately, I don't have a reference point to compare how the car would have performed with the original factory settings, but now let's talk about the top speed.

Fuel consumption for rural driving up to 120 km/h: 5.5-6 liters. On the highway, the average consumption is 8.5-9 liters.
'Full throttle, according to the MFA, maxes out at 18 liters.'

It had a makeshift, internally mounted fan before, which helped achieve a rough estimate of the final speed, but it was nowhere near the normal acceleration.


Does anyone have an explanation for that?
Hopefully, this will be helpful to someone, as it saved me a good 3000 euros!

Sure, here is the translation of the text from German to English:

'So long'
Thorsten