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Showing posts with label Common Rail Vibration. Show all posts
Showing posts with label Common Rail Vibration. Show all posts

Monday, December 5, 2016

Passat DSG Common Rail Vibration at Idle.

About 2 weeks ago I noticed a strange vibration on my 2.0 TDI DSG VW Passat 2011 with a CFFB engine, common rail.

It is my wife that drives the car and she did not noticed but I did as soon as I sat behind the steering wheel.
The vibration was mostly noticeable when the car was warm , at idle and in D , R or S prosition on the DSG gearbox.

The vibration was not noticeable when the engine was cold, or it was not there.
I started investigating the problem and the first thing I did was changing the engine mounts. This did help but not much.
After that I thought , Dual Mass Flywheel .. even if I did change the DMF about 30-40.000km ago I still thought I can hear it and decided to change it again.
So DMF changed, dogbone changed , subframe bushings changes ... vibration still there. Less noticeable but still there.

Then i thought injectors, fuel quality.
My wife is buying fuel from a gas station close to her work, but the fuels quality there are questionable.
So i went to Shell, filled up the tank and poured a can of Liqyui Molly Diesel Purge into the diesel filter housing.
Drove the car for a few miles to get it hot then came home and fired a Bell Add D2 cleaner into the intake to clean the intake and combustion chamber.
Engine became more quiet and I could not feel the vibration anymore .... until 2 days ago when I could feel it again.

Now I have ordered 4 injectors that drove under 1000km and I am going to install them this week.

Anyway, changing the Engine Mount, Gearbox Mount, Subframe Busing, Dogbone and cleaning up the fuel system did help a lot can I say but the vibration is still there.