ASZ geht unvermittelt aus | Posts 16+

Once again, regarding the engine control unit, you mentioned earlier that communication is not possible in case of an error.
That doesn't fit with a crack in the ZK.

Just let a log run, for example, with the injection amount and engine speed. Then, when the engine shuts off, you can see if the log breaks down beforehand or not.

Best regards, Rainer

Hm.....

Quote:

Initially, the engine runs normally. No air in the return, everything is fine. As soon as it heats up, there is suddenly a huge amount of very fine air bubbles in the return, so that it seems like pure foam, and then it also cuts out when you take your foot off the gas.

That actually speaks for itself. It probably won't work with foam. Are the PDs (presumably referring to fire dampers) to the combustion chamber definitely sealed now? "I haven't encountered a crack in the fuel system from the fuel side towards the combustion chamber before."

Well, then just run a PD Log in standby mode if it's currently producing air bubbles in the return flow. Record and upload MWB 13-18-23 for 30 seconds.
Give it a real boost. Let's see what he spits out.
If the auditing firm is already commenting on GDP figures, then it's worth taking a look at them as well.
Just a quick reminder about the fuel tank ventilation: The car has a fuel tank ventilation valve. This is activated whenever the fuel cap is closed.
I have attached a picture to this message. If you want to check the fuel tank ventilation, it is best to fill the tank to the brim and then screw on the fuel tank cap.
The escaping air must be clearly audible. Unfortunately, driving with an open fuel cap is not sufficient.
With the impossible access to the MSG, this also has nothing to do with it.

Hi
I think I've made a mistake.
I haven't made a mistake this stupid before.

I saw the air in the return duct.
Since I checked the fuel pressure and the priming pump at the dealer's, I have ruled out these two as the cause.
Error.
They only checked the booster pump at the dealer by measuring the power consumption.
Everything was fine.
Now I thought that I could further narrow down or rule out the cylinder head, so I'll check if there's also air coming in during the pre-compression.

What struck me was that when I removed the inlet, air was being sucked in, creating a vacuum.
Did I turn on the ignition, that's when the pump started pumping diesel?
I then installed a pressure gauge in the line. Initially, there was pressure in the line. As soon as the engine started, the pressure slowly decreased to a vacuum. This happened so slowly that the air bubbles only appeared once the engine was almost warm. Therefore, the assumption that it only occurs when the engine is warm is also valid.

Then I remembered that I had a similar case before. "This vehicle did not stall, but rather experienced a significant loss of power accompanied by strong vibrations."
The good man is a truck driver. They also sometimes like to fill up from a container.
They are not always clean.

I think the picture explains the rest.
I'm just incredibly annoyed that it didn't occur to me sooner.

However, the blocking of the control device still worries me.
I've already replaced the control unit. With the new tax device, this is no longer occurring.
I'll just put the old one back in and take a look at it again.

Otherwise, I will report on Tuesday once I have reassembled the Sharan and checked if it is running properly again.

But, of course.

Wishing everyone a wonderful weekend and thanking you all for your help.

Greetings
Bolzer

But then, think carefully and look for the right solution!
I'll get that STG thing sorted too.
hg
Herbert!

Great, thank you for your feedback!

Well encircled and found! I like it!

Is that a simple wire mesh that has gotten clogged? It looks like fluff or debris on the small display of the tablet.

The booster pump is hanging in the tank, right? Just now, the thought of cleaning a fuel tank crossed my mind.

Otherwise, the fuel already looked like diesel and smelled like it too. It's not the first time that vehicle problems and clogged fuel filters have been caused by contaminated diesel fuel. Because diesel fuel can be disposed of seemingly without any consequences, which would otherwise be expensive to dispose of as hazardous waste.

Hi

Yes. That's just a sieve.
The whole thing is a collection of dirt, fluff, plastic film remnants, etc.
The tank cleaning is also now scheduled.
Thankfully, the tank is also full. Otherwise, it wouldn't be fun


Greetings
Bolzer

Hello everyone

He runs without complaining or grumbling.

Filter cleaned, tank emptied and cleaned.
That was indeed it.

Thank you again to everyone.

Best regards, Bolzer

Hi Bolza!

Also, bitte nochmals einen starken Aufruf, um Deinen abschließenden Bericht zu verfassen!!

Best regards from Munich!