Touareg: 2011 V6 TDI
Join Date: Jul 2014
Second Vehicle: Still looking
Thanked 9 Times in 9 Posts
Whats going on? Uneven RPM
When giving a little throttle 17.2 - 17.6 % (14.5 % is idle) my rpm cycles between approximately 540 - 720 rpm. I tested it in P and logged it in VCDS, see picture. This also happens in D and R.
It cycles between "part throttle" and "enrich" as well. Throttle valve cycles between 0 - 5+ % and engine load cycles between 19.5 - 22.6 %.
I tried to graph the torque converter lock status as well, but I could not find it in the Auto-Trans.
Why is this happening? My car "jerks" if it is in R or D.
And lately when cruising at any speed it feels like the car stutters ever so slightly (my GF can not feel it), but the engine sound and RPM is even. And under acceleration it's not noticeable.
I'm not sure if these two symptoms is related, but I suspect so. The trans is regularly "reset" and every oil is changed during the last month, but the "problem" existed before this, and after.
Any ideas? Either for the problem or how to further investigate?