Re: A4 TDI 2.0 PD - injectors not injecting fuel after ZK Ta | Posts 80+

ascendens wrote:

J... it states that the device would measure very accurately...

Yes! then it can't be that

To give it another chance:
Please perform the next measurement with a fully charged battery, and activate the starter until the pressure no longer increases.
Repeat the entire process for each cylinder to assess the stability of the measurement.
The absolute values of the "very precise measurement" are not important at this stage.
hg
Herbert

Hello, so I have measured everything again very carefully, new battery, highest operating temperature, result: Cylinder 1/ 31 Bar, 2/ 31 Bar, 3/ 31 Bar, 4/ 31 Bar, you could see minimal differences on the measuring needle, meaning half of the needle at the marking and slightly above or below it.

I have then checked all cables and connectors for damage, wear, and oxidation, and everything was fine.

Then the vacuum and pressure hoses were checked for leaks, and they were found to be okay.

The PDE of Cylinder 3 continues to show fluctuations between +140 and +255 in the measurement block 13.

Engine smoking, smells bad at idle, when I give it some gas (around 2000 RPM), a powerful white-gray cloud comes out the back.

In the Standgas position, the turbo is clearly audible.
Then I disconnected the hose from the vacuum canister on the turbo, and I no longer heard any turbo sound.

Without vacuum pressure on the turbo:
Exhaust inspection, no more smoke
then 2000 u/min gas, no smoking, normal burned diesel smell. what's going on?

It is currently only half complete (or reported), but let's assume that the compression values are uniform.
What is the current cold and hot idle speed control (injector quantity correction) setup?
hg
Herbert

The engine runs cold, warm, quiet, and smoothly. I haven't taken any readings yet, but I will do so first thing tomorrow morning.

Hello, here are the measurements. I hope they provide some insight. I'm just not sure what to do next. I stated that the Turbo VTG wouldn't smoke without vacuum, and that's how it was yesterday, but it's also smoking today. Could it be that my PDEs aren't functioning properly, and that's why it's smoking?

Herbert wrote:

Although it is only half complete (or reported), let's assume that the compression values are uniform. How does the idle speed control cold and warm (injector quantity correction) work now? hg Herbert

Can you please read and then pass on the data? Is Cylinder 3 now stable?
Next, the next steps:
- Clear error codes;
- What errors are recurring?
- What are the TL numbers on the installed PDEs?
hg
Herbert

Please excuse Herbert, I'm completely exhausted, I've been messing with this box for ages, but I'm not giving up.
I have cleared the fault codes, repeatedly turned the ignition off and on, then started the engine, and no further fault codes appeared.

Installed PDE's 4x Bosch 0414720229 PDB 037 / 038 130 073 YR

Today, I performed a diagnostic check on the AGR (Gas Reste Rückführung) and turbo components. When I activated the AGR, it emitted a lot of exhaust fumes from the engine, and I couldn't pinpoint the exact location. To properly diagnose it, I would have needed to reactivate the AGR, but I found it too risky. Furthermore, I couldn't see anything in the back, as it was emitting a lot of fumes.

When activating the turbo, it only emitted smoke at the back, I'd estimate about 70% less than with the AGR.

Then I have repeatedly noticed the values of the AGR, could it be that this part has a defect due to a short circuit. I tested the AGR (Exhaust Gas Recirculation) system in its fully installed state about 2 weeks ago to see how much it opens and closes. The valve moved approximately 1cm open and closed. Is this correct?

I think, the more information I provide here, the easier it will be for the professionals to identify errors.

I'll summarize it now:
- the engine can be restarted again with a new battery;
- The compression values are uniform, as far as can be assessed by a low-cost inspector;
- Injection quantities are within the tolerance range;
- Corrections to the idling time are within the tolerance range;
- no more entries in the MSG fault memory;

That should conclude this thread. To prevent him from continuing, I'm shutting him up.

Your engine diagnostics indicate a problem with the fuel system. If there is also smoke coming from the engine compartment, you have likely assembled something incorrectly. You need to check this according to your repair guide.

Now you drive, and when new problems arise, you'll come back with a usable problem description and a verschandeln scan.

hg
Herbert