B
Many thanks to blueabyss for this information and help. Unfortunately, I am not that professional. I will try to replace the common rail with a regulator (never removed) from another car and report the results.
Problem with W204 RPM Fluctuations
- Thread starterB0bby92
- Start date
B
Another thought, could a faulty O2 sensor be causing these fluctuations?
Try one of the possible options.
I do not think that the O2 sensor can cause these anomalies, but I'm not sure without measurements.
If you cannot exclude the malfunction for a test rail replacement, I would look at the bridge clutch of the torque converter. This is where the torque converter bypass clutch should be temporarily disabled in the XENTRY.
If you disengage the clutch, the symptoms it may have caused will disappear - be careful, the car will start to slide.
I do not think that the O2 sensor can cause these anomalies, but I'm not sure without measurements.
If you cannot exclude the malfunction for a test rail replacement, I would look at the bridge clutch of the torque converter. This is where the torque converter bypass clutch should be temporarily disabled in the XENTRY.
If you disengage the clutch, the symptoms it may have caused will disappear - be careful, the car will start to slide.
N
Yes, because the O2 sensor determines how much fuel should be injected. If it is faulty, its readings will be erratic, which will cause problems with the fuel injectors not injecting enough fuel or injecting too much fuel in an attempt to maintain the A:F ratio at 14.7:1.
B
Yes, the O2 sensor has been completely dead lately (Check Engine light came on and XENTRY diagnostics showed it). I will replace it and report back to share.
Attention mate, we are talking about a diesel car. This engine runs on excess air.
B
The torque converter has been recycled.
N
Thanks for the correction, I was speaking in general terms.
I would like to note that the fault may also be in the torque converter clutch bypass valve - it stalls. Diagnostics does not reveal this defect. Again, this can be found out from the actual values - consumed and actual current (A) for a given valve. Again, the test can be performed by disabling (XENTRY) the inverter bypass clutch. Applies to gearbox (722.6).
B
I replaced the O2 sensor today but this error keeps coming back. What should I do? Please help!
