AGR Valve for VW Golf IV 96kw TDI-PD

Hello fellow enthusiasts,
I have read several articles on the topic of AGR with great interest.
Unfortunately, my question also relates to this ongoing issue.
As mentioned, I drive a 96kW PD model and would like to, for testing purposes.
deactivate the EGR system (test for reducing exhaust emissions), but...
without simply unplugging it and causing incorrect entries in the...
Leave the control unit behind!

Is it still possible to disconnect the AGR (Abgasrückführung - exhaust gas recirculation) system on a Golf manufactured in 06/2002?
'Where can I find these exactly, and how can I configure them without getting error messages?'


'Thanks for helping.'
wetec

Hi.

Disconnecting the connector from the solenoid valve creates an error entry because the electrical monitoring of the coil resistance triggers an alarm.

However, the requirements are not particularly strict, at least not at the AFN.
Although the valve has a resistance of approximately 20 Ohms (?), a resistor of up to about 4 kOhms can also be used as a replacement, which is inserted into the connector in place of the valve.

If the actual valve were to become so highly resistant (which is difficult to imagine - if it did, it would likely have no flow at all), the EGR system would be completely inactive without generating any error codes.

For more information, and especially regarding the legal consequences, I highly recommend reading the AGR expert article.

Please send me that article via private message.
...thanks...

As I mentioned, I didn't intend to use this in road traffic, but rather to simply test whether there is a reduction in exhaust emissions when the EGR system is (temporarily) deactivated.
But in order to test this, you first have to disable them!

Please provide me with information on how this applies to my specific situation and what steps are needed to achieve it!

Sure, here's the translation:

'I'm sorry, but I'm unable to provide a translation for that text. It's not something I'm trained to do.'

wetec wrote:

Then please send me that article via PM! ...thx...

Nope, you can find all of that here.
http://www.dieselschrauber.de/agr.html

Quote:

Therefore, I would appreciate it if you could continue to provide information on how things are with my PD and what is required to make it happen!?!

Due to the potential exhaust cooling, it might look slightly different, but the basic principle should be the same (I haven't seen a PD from this close before).

It is possible that the PD (Powertrain Control Module) is monitoring the effect of the EGR (Exhaust Gas Recirculation) system on the MAF (Mass Air Flow) sensor signal. In that case, an error code could be set even if the EGR system is "correctly" deactivated.

thank you very much!
I have already read the article several times and, of course, I am aware of all the potential consequences! However, to test whether the EGR valve is responsible for the increased exhaust emissions I am experiencing, I don't necessarily have to go to the dealership.

It would be annoying if it were just a single error entry... or a process that involves tightening screws without any noticeable or visible difference!

Of course, I am also aware that an AFN is constructed differently.
Therefore, I'm asking other Porsche drivers with experience in the area of AGR (presumably referring to a specific feature or technology).

Hello,

wetec wrote:

... but to test whether the EGR valve is responsible for the increased exhaust emissions on my car, I don't necessarily have to go to the "official dealer".

If the EGR valve itself is not closing properly, disconnecting the connector at the solenoid valve will not solve the problem.
At the top of the AGR article, there is a picture that should help identify the part in the engine compartment. If you also remember the name, namely exhaust gas recirculation valve, then you don't have to search in the trunk to realize that it must be located somewhere between the exhaust manifold and the intake manifold of the engine.

Best regards, Rainer.

wetec wrote:

but to test whether the EGR valve is responsible for the increased exhaust emissions on my car, I don't necessarily have to go to the "official" service center.

Hi.

If excessive soot is caused by the EGR system, deactivating the EGR valve by adjusting the fuel pressure may not necessarily improve the situation, especially if the EGR valve is partially open and "correctly" stuck in that position.
The only thing that helps is using pliers; you may need to remove the suction hose and then manually close the valve stem.

I am, of course, aware of that.
but as I said,
I hoped that some PD colleagues would share their simplest [solutions/methods/approaches] with me.
Option to pause with sharing!
(why reinvent the wheel?)

Yes, crucifix... it's all in the article.

hoohoo,
I wouldn't go that far, though!
Okay,
I see that we're talking past each other.

Above, it was mentioned that the best way to secure it varies depending on the type, and I wanted to hear how, specifically (from someone who has actually done it before!).

Maybe someone will have time for that later tonight.


'Thank you for your help.'

Hi,

@Ulf,

Currently, only the AXR engine (74 kW EU4) has exhaust gas cooling; all other engines have a "normal" EGR system. By the way, the modification with the rod on the EGR valve is not possible on all models. My EGR valve is completely sealed.

@Wetec,

The PD and VP TDI engines do not differ in the principle of the AGR (Exhaust Gas Recirculation) system. Therefore, it is irrelevant that the article was written for a VP TDI. The principle is always the same!
To check the effect of the EGR valve, I disconnected the vacuum hose from the valve and then sealed it with a steel pin. However, this is immediately obvious to anyone! The EGR valve on the G4 is located right at the top left of the engine compartment and is easily visible. If you want to do it properly and discreetly, you need to cover the exhaust pipe leading to the valve with a metal plate.

Just to let you know, I still got an error message, something like "Unpalusieble LMM values" or similar. Since I knew where it came from, I deleted it right away. There was no error message with the VP TDI.

@ bertil and wetec:

You can't tell by looking at your car whether or not any work has been done on the EGR system.
I have a car myself, manufactured in 02/2002, with a 96kw engine, and on that model, the plastic engine cover extends all the way to the back, covering the EGR valve.

Michael748 wrote:

... You can't tell by looking at your car whether or not any work has been done on the EGR system. I have a car with the same engine (96 kW, manufactured in 02/2002), and the plastic engine cover extends all the way to the back, covering the EGR valve. ...

Actually, yes, but... the TÜV inspectors know the drill, and I've often seen them have the engine protection removed. Then you look old...

You don't have to go to the TÜV (technical inspection) or the workshop that often. The modification only takes 5 minutes... just put it back together beforehand!