A4 B6 2,5 TDI 180 Ps BAU, Leistungsloch unter ca 2800 U/min | Posts 64+

Can I buy them individually? Do you have a link?
I thought it wouldn't be possible because they are vulcanized.

I don't have a link; I bought them in a small lot. I'll check if there's a part number on the packaging.

Okay, here's an idea from a different angle.

If the engine pulls "almost normally" or normally in the higher gears, I would initially rule out anything that is cylinder-specific. The compression, injectors, and camshaft have no idea that the engine is now in 6th gear. Therefore, it doesn't really make sense to look there, even though the engines are known to cause problems in that area.

What about the pressure side of the charger? Intercooler hose leaking, intercooler has a crack, etc.

That would explain it; there's a loss of charge air, which means there's less oxygen in the exhaust, and that, in turn, results in poorer throttle response.

You're right, I could always try printing a test page.

"...however, the boost pressure and air mass are within the specified range, so a leak should be ruled out?"

Does this problem also occur in the lower levels?

If the boost pressure is okay, what about the charge air temperatures?

Is it possible to detect "weather sensitivity"?

Yes, the values are above the target values throughout the entire speed range. I haven't explicitly checked the temperature yet, but the problem is not weather-dependent.

Then it would likely produce smoke or soot, and the exhaust would appear cloudy, if you accelerate in second gear while having air mass and boost pressure without generating power. Assuming, of course, that there are no errors in the system and that the injection start time, as you mentioned, is correct (which I assume is the case, since the problem only occurs in certain gears).
What are the fuel injection amounts at full acceleration in 2nd gear compared to 4th gear? They should be the same. If that is not the case, then it is necessary to determine which parameter is causing the reduction in the lower gears.

Okay, so I've installed the new injectors. And sure enough, it now pulls much better from low RPMs and has more overall power. The acceleration from 2000 to 4000 RPM in 3rd gear has improved from 5.8 to 5.3 seconds.

So, it seems the nozzles definitely have a higher flow rate.
I also took some new K-Power measurements, covering the same route there and back.

The injectors installed are Firad DSLA142P1025, and according to Dieselsend and my research, these are the correct injectors for my engine.
Can someone shed some light on this?

Okay, I'm not upset about it. It accelerates really well. The slightest bit of smoke is only visible in the second gear at high RPMs under full load, and only in the rearview mirror.