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Maf sensor problem after change manifold air flap please help

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Old 04-27-2018, 12:24 PM
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w204 c200 cdi & ml350 w164
Maf sensor problem after change manifold air flap please help



Hi i have ml350 2009 and iget error p0521 tumble flap is broken i buy new flap from ebay and change it now the prublem Disappeared, but a new problem iget, now I get a problem with other cylinders change misfier , and Faltering, and gives like a gas small gas kick when istop in traffic,, after idrive the vehicle drive vary good , i tray disconnect the sensor and everything gone and the vehicle drive very well and quiet, What do you think is the sensor or something else?

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Old 04-27-2018, 01:12 PM
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Throw the crappy scanner in a river and get a system like DAS Xentry
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Old 04-27-2018, 01:55 PM
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Originally Posted by Plutoe
Throw the crappy scanner in a river and get a system like DAS Xentry
Way i think this is vary good scanner for Scanning to the average user ​​​​There are some Valve that I can test the maf sensor working good or not
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Old 04-27-2018, 02:47 PM
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Originally Posted by roei
Way i think this is vary good scanner for Scanning to the average user ​​​​There are some Valve that I can test the maf sensor working good or not
No, it is a crap scanner that doesnt understand Mercedes codes and cannot talk correctly to the computer and subsystems in your car.
You should get this one. You should get this one.
Or take it to a dealer or MB shop that has a Star Diagnosis computer,
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Old 04-27-2018, 03:01 PM
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Thank you,
someone knows how to distinguish between a vacuum leak or bad maf sensor When I disconnect the maf sensor the engine works very good
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Old 04-28-2018, 01:25 PM
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Ifix it i find vacum leak in the y conector now the car very good and no error
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Old 04-28-2018, 02:26 PM
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Originally Posted by roei
Ifix it i find vacum leak in the y conector now the car very good and no error
Well done.
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