2.0 TDI Rough Idle (judder), and Excessive Smoking from Cold Start
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2.0 TDI Rough Idle (judder), and Excessive Smoking from Cold Start
Hi guys
Hoping you can help me out a bit with this as done a lot of research online and found LOTS of people having the exact same/very similar issues with their 2.0 TDI engines across the Audi range. Mine is the A6 2.0 TDI 2008. However, in all the research I did nobody was providing a single solution. So hoping someone may recognise my symtoms...
When all warmed up seems very happy indeed.
However, from a cold start the revs can be a little juddery. You can feel a light shaking to the car. When you increase the revs it seems to 'stutter'.
I have taken a video. You may be able to make out the light shaking/juddering. Watch as revs increase:
This is accompanied by excessive smoke, which I would say is white. Check it out:
Any ideas very welcome!
Hoping you can help me out a bit with this as done a lot of research online and found LOTS of people having the exact same/very similar issues with their 2.0 TDI engines across the Audi range. Mine is the A6 2.0 TDI 2008. However, in all the research I did nobody was providing a single solution. So hoping someone may recognise my symtoms...
When all warmed up seems very happy indeed.
However, from a cold start the revs can be a little juddery. You can feel a light shaking to the car. When you increase the revs it seems to 'stutter'.
I have taken a video. You may be able to make out the light shaking/juddering. Watch as revs increase:
This is accompanied by excessive smoke, which I would say is white. Check it out:
Any ideas very welcome!
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Quick update on this...
Today I removed the EGR valve. Yes, dirty and some carbonin there, but nothing ridiculous. All cleaned and ready to refit.
I also connected up Vag Com which showed no issues on the auto scan. I did the live data and tested 013 injector quality quickly.
Admittedly engine was not particularly hot (especially at first).
I noted on idle injector readings fluctuated a bit, but at one stage I saw this:
-1.01 -0.05 1.22 -0.28
I'm not an expert at all on these readings, but I think from my research that up to =-1.1 in acceptable?
So injector 3 a little high there. But like I say, it fluctuated and dropped back down to normal levels, and all four seemed reasonably happy.
So then I revved up to 2,000 ropm which is where the stuttery/judder happens as per my video above. I got this readon this time, which I could repeat with similar results each time:
2.31 All others around 0.78 mark
So injector 1 standing out on it's own with a high figure running up to 2,000 rpm. I assume that can't be normal?
Today I removed the EGR valve. Yes, dirty and some carbonin there, but nothing ridiculous. All cleaned and ready to refit.
I also connected up Vag Com which showed no issues on the auto scan. I did the live data and tested 013 injector quality quickly.
Admittedly engine was not particularly hot (especially at first).
I noted on idle injector readings fluctuated a bit, but at one stage I saw this:
-1.01 -0.05 1.22 -0.28
I'm not an expert at all on these readings, but I think from my research that up to =-1.1 in acceptable?
So injector 3 a little high there. But like I say, it fluctuated and dropped back down to normal levels, and all four seemed reasonably happy.
So then I revved up to 2,000 ropm which is where the stuttery/judder happens as per my video above. I got this readon this time, which I could repeat with similar results each time:
2.31 All others around 0.78 mark
So injector 1 standing out on it's own with a high figure running up to 2,000 rpm. I assume that can't be normal?
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