Probleme beim Auslesen von Messwertblöcken 1Z-Motor | Posts 16+

Thank you for the response. I also thought that I could use VCDS to adjust the MSW. But even for me, it only reads group 000. Do you know of any other way to adjust the RSW encoder?

Albten1186 wrote:

Thank you for the response. I also thought that I could use vcds to customize msw. But even for me, he only reads group 000. Do you know of another method to adjust the RSW encoder?

For very old 1Z devices, only measurement group 0 is available.

For the initial adjustment with a warm engine idling, set the injection quantity to 4-5 mg/stroke by adjusting the quantity adjustment knob accordingly.

Unfortunately, I can't tell you what value that corresponds to in measurement block 0.

Best regards, Rainer.

At the start of injection, a graph displays field 2 (injection start) and field 9 (fuel temperature) from block 000, showing a linear relationship.
You would find that information in the relevant guide.
Here are some values from my 1994 engine as a reference.
- Temperature between 50 and 210.
- Injection timing starts at 60 (temperature 50) and decreases to 30 (temperature 210).
- Tolerance +/- 20.
That might have been different with the '93 engine.
VCDS should provide this information with the timing checker and engine selection features! Or is your version that bad?
hg
Herbert.

It's about the amount of fuel being injected.

Well, well!
Field 4: The range would be 10-45 for an ESP with an HDK quantity setting device. For the 93 model, it might still be an MSW with a potentiometer. Please search for specific RLF information related to Erwin.
hg
Herbert.

Hello everyone, thank you for the many responses. I understand that I can control the injection amount for group 000. Actually, I'm reporting all the values now because I have a question for you.
Field 1: Engine speed: 40-41. Specification: 39-42.
Field 2 injection start: 85~89. Specifications: 50-65.
Field 3: accelerator pedal, value 000.
Field 4: Injection quantity: 10~11. Specifications: 15-30.
Field 5: boost/manifold pressure: 115~116. Specifications: 116.
Field 6: Atmospheric pressure 118. Specifications: 116.
Field 7: Coolant temperature: 72. Specifications: Warm: 62 (approximately 90°C), Cold: ~196 (approximately 20°C).
Field 8: Intake air temperature 75. Specifications: warm 97 (~30°C), cold ~82 (~20°C).
Field 9: Fuel temperature: 115. Specifications: Warm: 127 (~40°C). Cold: ~91 (~20°C).
Field 10: mass air flow 169, idle 80-99, full load 190-255.
As you can see, there are several parameters outside of the specification. It could be due to an injection start that is slightly too early (which appears in the diagram, but only slightly), and an idle injection quantity that is too low. Now I'm going to replace the timing belt, and then adjust the injection start and the idle injection quantity. However, the MSW (presumably a component) needs to be disassembled because there is still a small diesel leak. But do you think I need to open the box to verschandeln it, or should I just try to repair these fields and see if it works without opening it? What do you think about fields 7, 8, 9, and especially 10?

According to your instructions for opening the RSU, I should find the voltage value of the encoder (the black lever on the electronic circuit board inside the RSU), but I believe I understand that there is no way to obtain this value. If I do this, I'll take a picture of it. Try to get it back into the same position. But maybe MSW doesn't need to be opened, and the problem is just due to the low injection volume and advanced injection timing?

To give you an idea of what the defect is, I've created 2 videos; the first one shows the neutral position.

As you can see, the performance drops as soon as 1400 RPM is reached. If I don't release the accelerator pedal, it seems like it wants to shut off, but if you manage to exceed 1400 RPM, it seems to be okay. If you sometimes give it gas when it drops below 1400 RPM, the RPMs decrease slower than normal. The second video shows the car running.

Please upload the videos here in this thread.

Quote:

Field 1: engine speed 40~41. Specification: 39-42. Field 2 injection start: 85~89. Specifications: 50-65. Field 3: accelerator pedal, value 000. Field 4: Injection quantity: 10~11. Specifications: 15-30. Field 5: boost/manifold pressure: 115~116. Specifications: 116. Field 6: Atmospheric pressure 118. Specifications: 116. Field 7: Coolant temperature: 72. Specifications: Warm: 62 (approximately 90°C), Cold: ~196 (approximately 20°C). Field 8: Intake air temperature 75. Specifications: warm 97 (~30°C), cold ~82 (~20°C). Field 9: Fuel temperature: 115. Specifications: Warm: 127 (~40°C). Cold: ~91 (~20°C). Field 10: mass air flow: 169, idle: 80-99, full load: 190-255

Field 10 in the vehicle may not represent the "mass air flow," but rather the voltage of the potentiometer for the throttle position sensor (G99, target value 55 - 80). It depends on the software version.
The principle of regulation using a potentiometer can be found in the SSP145.
hg
Herbert.