Hey everyone!
I need some help diagnosing an issue with my 2010 SEAT Leon Mk2 2.0 TDI 125 kW DSG. The problem is that, while idling in P, N, or D, the RPM occasionally dips sharply (roughly once every 5 - 30 seconds). Sometimes the drop is severe enough to cause the engine to stall.
So far, my mechanic has had the injectors cleaned and restored, replaced the fuel pressure sensor on the fuel pump, replaced the other fuel pressure sensor under the hood. Meanwhile I have cleaned the EGR valve and later coded it out and physically shut off the EGR valve.
Unfortunately, none of this has solved the problem.
I have access to OBDeleven, so I can monitor live data and perform adaptations/basic settings, but I'm not really sure which measuring values or parameters I should be looking at.
In the graphs below, you can see the RPM drops and what happens with some of the other parameters at the same time.
In the first image, the car was completely idling on its own. In the second, I slightly pressed the accelerator pedal to prevent it from stalling.
What should I check next? Are there any specific live-data values, measuring blocks, adaptations, or tests that would help narrow this down? My mechanic doesn't know what to check next, and two other shops have also refused to diagnose it because they aren't sure what could be causing the issue.
Any advice or suggestions would be greatly appreciated.
I need some help diagnosing an issue with my 2010 SEAT Leon Mk2 2.0 TDI 125 kW DSG. The problem is that, while idling in P, N, or D, the RPM occasionally dips sharply (roughly once every 5 - 30 seconds). Sometimes the drop is severe enough to cause the engine to stall.
So far, my mechanic has had the injectors cleaned and restored, replaced the fuel pressure sensor on the fuel pump, replaced the other fuel pressure sensor under the hood. Meanwhile I have cleaned the EGR valve and later coded it out and physically shut off the EGR valve.
Unfortunately, none of this has solved the problem.
I have access to OBDeleven, so I can monitor live data and perform adaptations/basic settings, but I'm not really sure which measuring values or parameters I should be looking at.
In the graphs below, you can see the RPM drops and what happens with some of the other parameters at the same time.
In the first image, the car was completely idling on its own. In the second, I slightly pressed the accelerator pedal to prevent it from stalling.
What should I check next? Are there any specific live-data values, measuring blocks, adaptations, or tests that would help narrow this down? My mechanic doesn't know what to check next, and two other shops have also refused to diagnose it because they aren't sure what could be causing the issue.
Any advice or suggestions would be greatly appreciated.
