Leistungsverlust TDI trotz Höchstgeschwindigkeit | Posts 16+

hello,

'Why don't you take it for a test drive with the missing...'
Fuel cap - but be careful: only open when the tank is almost empty.
and just straight ahead. That would be just as good as using a canister.
Insert it from the front. If the fuel vent is not working properly...
The ESP sucks in air at the weakest points in the system!

Best regards, Jürgen.

Hello,

I also read about the fuel cap issue. Unfortunately, it won't help if the line from the tank is blocked somewhere and/or if air is being sucked in somewhere due to the vacuum.

I flushed the line from front to back with a lot of pressure, and now it's working. Something was blocking it.

Garth Brooks:

Did you also have air bubbles in the hose at the front?

The question is how to most easily diagnose such a blockage.

Has your car reached its maximum speed? In my case, the problem disappears again above 3000 RPM, and the car runs normally.
I don't think that would be the case with a blocked sprinkler line, would it?

I'm going to build a diagnostic adapter in the next few days; otherwise, I won't be able to figure out what's causing the problem.

Hello Ulf,

I had read your filter theory, and it was also one of the starting points for my own reflections.

Now I can tell you: If the resistance is already so high that bubbles form, or the system starts sucking in air due to even the smallest leaks, the whole thing will quickly break down. The fuel injection system malfunctions, and the engine becomes sluggish and produces excessive soot.


Here's another tip for your filter: Put a €2 paper filter before the main filter. You can see if there's any dirt in it, and you can keep the main filter running for a very long time. Mine had 60,000 kilometers on it, and I only replaced it now because of the problem I was having. But I think it would have been okay for longer. By the way, I changed that paper filter four times during that period because it was obviously getting dirty.

Regarding the other question - Yes, there were probably air bubbles, but likely only at high speeds.
The frustrating thing was that everything seemed fine overall. What was noticeable was that there was always a bubble inside my paper filter, which wasn't there before.

Okay, now the only problem I have is that the initial setting is too late, and I need to adjust the pump.
must be twisted.
Best regards, Garth.

Hi there,

The new generation of diesel filters installed in the Touran no longer uses that often leaky connector. Now, all hoses are directly connected to metal fittings.
On the other hand, there are no more transparent hoses where you could see air bubbles. Why is that? Probably because there were too many complaints about it.
Perhaps this new filter can be installed instead of the old system to prevent problems with air leaks.

Regards,

Eike.

The issue I'm experiencing is that the power loss isn't limited to a specific RPM range; it occurs regardless of the engine speed. When I press the accelerator (after releasing it), I get power for about 2-3 seconds, then there's a sudden drop in power. If I release the gas again and then fully depress the pedal, the same thing happens. This also occurs at 180 km/h (my top speed with a roof rack). In fact, when I perform this procedure, the car actually slows down slightly during the power loss.However, his performance hasn't suddenly returned to its former level. In fact, I'm not even sure if he still has that ability.

I also have bubbles in the fuel line. However, I don't know if I had them before the recent fuel filter change. They are visible at higher engine speeds, but not really noticeable at idle.
I also drove about 35 km with an open gas tank (a half-full tank works too), but it didn't help (or rather, I need to check that again with someone else because it's hard to control the throttle and look under the hood at the same time).
@garth.brooks
How is that supposed to work with a canister in the engine compartment?

Is there anyone from Kiel here who might be interested in doing a test drive with me sometime, or perhaps lending me their mass airflow sensor (MAF) for a short period? I'm willing to pay for it.
My email address is maltep@gmx.de.

Regards,
Malte (brother of Wurstblinker).

I work in Kiel, but I only have a G3 security clearance. I'd like to help if I can, but I'm not sure how. If you think of anything, please let me know.

Here's the translation:

'By the way, I'll also answer on behalf of Garth Brooks...'
He suggested placing the full diesel canister inside the engine compartment (and securing it), disconnecting the hoses from the diesel filter to the tank, and then connecting the diesel filter to the canister.

Regards,
Private.

Hello,

To avoid any confusion, I am now posting under my own name and not under my brother's username, 'Wurstblinker.'

I just completed a test run with Rudi in Kiel. It appears that the engine is not receiving enough air in certain situations. I'm providing the measurement data for download as an Excel file:

http://www.preugschat.de/LOG-01.CSV
http://www.preugschat.de/LOG-02.CSV

Can anyone comment on this?

Regards,
Malte.

I also had to 'reluctantly' replace my fuel filter recently. First, I drained the old one and then noticed that it was drawing air bubbles even when idling. I thought maybe the filter could still stay in place for a while, so I initially just replaced the hose clamps with screw clamps and installed new seals in the valve. Since there was no improvement, I ended up replacing the entire filter, and since then, there haven't been any more bubbles, and the engine runs much better.

Question: If I'm not mistaken, the filter is replaced every 60,000 km by default, right?
Mine now has approximately 35,000 km on it and is so tight that I've felt a loss of power - or it wasn't replaced during the last service, contrary to what was stated on the invoice.

Hello Malte,

What was the outcome? I would appreciate a final report, as I think I might be experiencing the same problem with my 2000 AJM.

Regards,
Gerd.