94 80 1.9 tdi Juddering mystery n75?

[Lewis]

Hi everyone. I know there are quite a few threads on the 'juddering problem', and I have tried all the suggestions, including cleaning the intake manifold, but to no avail. It occurs with my 1994 estate 150k between 20\30000 revs and the only thing so far that has improved it is to disconnect the speedo! This has made it drivable again but it's really underpowered and still has a faint judder. I guess it may be an electrical fault and have noticed that the n75 valve clicks rappidly sometimes, even when the engine isn't running and ignition is on.

My questions therefore are,
1. Would this suggest a faulty relay that sends the message to the n75, or the valve itself.
2. Why should disconnecting the speedo help.
3. Has anyone experienced the same and got to the bottom of it?

Any help at all would be most appreciated.

[Ian W]

sorry to be of no help at all mate but, you don't happen to own a mkiv supra as well do you?

:)

[Lewis]

Affraid not no.

[Ian W]

Affraid not no.

no worries mate, thought it was a long shot :d

good luck with sorting out your problem anyway.

[midskev]

hi lewis its frustrating isnt it im waiting on a new throttle potentiometer to try that and i also have an overboost prob wich could point to the n75 or the wastgate actuator but i wil get to the bottom of it as its really bugging the hell out of me lots of talk about it in the tdi club too but no answers