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Hello, I'm Brandon - VW Tech.
It is most likely the ignition coil is bad.
This is the main reason why it is misfiring.
The part cost $134.
Bremi is a good VW brand.
please rate me positive for the prompt service. Thank you!
Yes, it is possible the mass air flow sensor is faculty.
Is the check engine light on?
You have a OBD2 data logger to check the coil performance?
This is computer where it can check the spark duration.
The module and the coils are together as one unit. VW have a change on the coil. You need to get the latest coil from the dealer. Their unit is most up to date.
Yes, a stuck injector can cause a miss. I will check the schematic tomorrow morning. Will keep you posted.
Motronic Engine Control Module (ECM) control the fuel injector not the coil.
The injector can be leaking a cause the injector to fail.
The fuel injector can be changed individually.