RPM fluctuating on idle sometimes
I have a problem with my W213 - 2016 220d. I have not waranty. After last oil and filter changing I saw problem. When I was on trafic jam I feel engine unevenly work. I was on my MB machanic. Checked fuel injectors, and lot of other parameters. He changed low presure valve (??) but problem not solved. Now he reset a settings of this valve and problem seems be bigger. he told the car should learn new setting within 200km.
It is only when car is idle. It doesnt metter P / D / N on each is the same. I do not made a photo from OBD but it was something like this:
This RPM down are not repeatable on time.
When I drive I do not feel nothing disturbing. Car has normal power and acceleration.
Anybody has similar problem? Where I can looking for a solve?
Last edited by skrawit; Jul 16, 2022 at 03:34 PM.




I saw mechanic checking fittings connections but I can try made it again.
Diagram with fuel pressure also look like this in my first post. So fuel presure go down for a moment. We can not find any erros on OBD.




Keep tracking the fuel pressure topic 👍




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You have Xentry, use it to see fuel pressure does remain stable.
Next look at exhaust back pressure data.
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