Dear Pros,
I am trying to diagnose what is going on with my Mercedes Viano 2.2. L from 2008 with 160'000km. (WDF36981313464707).
All injectors had been checked, cleaned and re-installed a few months back. For info also my battery is new.
The symptoms are white smoke that smells like diesel no matter if the engine is hot or cold, poor mileage and a shaky engine.
I started by unplugging the injector connectors one after another and I noticed no change when pulling out cylinder 1. Funny enough, the car stopped smoking with the injector 1 unplugged. With it plugged back it shortly started smoking again.
My OBD2 scanner gives me fault ECM 2268 component N14/3 Glow output stage does not work properly, this with 4 new glow plugs freshly installed. The car starts well so it tells me the glow plugs should be working fine.
Next, I tested the continuity of the wiring between the ECM and the injectors which is all okay.
With a multimeter, I am unable to read any resistance in Ohms across the any injector pins. I get about 2.4V on the power wire to the injectors.
Could my ECU be shutting off one cylinder due to a sensor fault or is it the obvious; a faulty injector sometimes stuck open, sometimes stuck closed?
Thank you in advance for your help
PS: I do not have an amp meter or oscilloscope.
I am trying to diagnose what is going on with my Mercedes Viano 2.2. L from 2008 with 160'000km. (WDF36981313464707).
All injectors had been checked, cleaned and re-installed a few months back. For info also my battery is new.
The symptoms are white smoke that smells like diesel no matter if the engine is hot or cold, poor mileage and a shaky engine.
I started by unplugging the injector connectors one after another and I noticed no change when pulling out cylinder 1. Funny enough, the car stopped smoking with the injector 1 unplugged. With it plugged back it shortly started smoking again.
My OBD2 scanner gives me fault ECM 2268 component N14/3 Glow output stage does not work properly, this with 4 new glow plugs freshly installed. The car starts well so it tells me the glow plugs should be working fine.
Next, I tested the continuity of the wiring between the ECM and the injectors which is all okay.
With a multimeter, I am unable to read any resistance in Ohms across the any injector pins. I get about 2.4V on the power wire to the injectors.
Could my ECU be shutting off one cylinder due to a sensor fault or is it the obvious; a faulty injector sometimes stuck open, sometimes stuck closed?
Thank you in advance for your help
PS: I do not have an amp meter or oscilloscope.
Apr 14, 2023 at 12:49 PM
