ok, i give up. after weeks of trying to figure it out. has anybody else got to the bottom of the audi 80 tdi (1z engine) problem where the vehicle judders/jerks/bucks at light load at anything between 1200-2000 rpm

after this it clears, also flooring it, it will pull through.

symptoms like this have been described by so many people, but no one knows the problem as of yet.

in a few cases, it has been said that the car also idles roughly, as is the case with my car.

PLEASE HELP if you know what it might be. i will not list everything that i have done, as the list is too extensive, instead i will read comments and let you know whether i have allready tried what you suggest.

i know there are more than five people knocking around the net with this problem, and some of the posts are a year old or more, and the problem is unresolved

the closest i have come to curing the problem is unlpluggin my vss (vehicle speed sensor). this seems to eliminate the problem. however i cannot run the vehicle like this all of the time as i have no speedo or odometer and it also disables certain engine management functions.

i look forwards to hearing your replies