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TOPIC: Judder stationary

Judder stationary 20 Oct 2019 04:54 #21017

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I am new to this forum and just bought a MY80 928 Manual Euro in moccabraun with
It is very original and very very nice :)
One thing though: When the car is warm and I am at a stoplight (engine speed stationary) the car rocks from left to right pretty badly.
Strangely it doesn't do this when cold (engine speed higher?).
I read a couple of posts about this phenomenon, but I could not find a conclusive story so far.
Can anyone help me out as to what this can be?
Much appreciated.


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Judder stationary 29 Oct 2019 22:23 #21033

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Have you checked the engine idle speed while warm? The specs are:

idle speed setting: 700 RPM plus/minus 50

These are tune up items:

Spark Timing: 28 BTDC @ 3000 RPM (vacuum hose detached)

CO% 1.5% plus minus 0.5
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