Judder stationary

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20 Oct 2019 04:54 #21017 by vvllvv
Judder stationary was created by vvllvv
Hello,


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.


Regards,


Vincent

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29 Oct 2019 22:23 #21033 by Rich928
Replied by Rich928 on topic Judder stationary
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

Rich
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1993 928 GTS Cover Girl
1987 928 S4
1979 928 5-speed rescue
1979 928 5-liter track beast

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