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Discussion Starter #1
After fixing an engine miss (wrong spring in the coil pack), I did some other maintenance (cleaned throttle body, new airfilter, new plugs).
Now the car has an unstable idle when the car is moving (ie pushing in the clutch). It varies from 1500 to about 700 and then back up - it's like it's hunting for a stable point but can't get there. When the car stops (no output from the VSS), the idle is stable, but high at 1300-1400 rpm.

Checked the idle air valve - everything was clean and moved freely (and obviously its working since the idle is varying).
Any ideas?
The only thing that comes to mind is a possible disconnected vacuum line.
 
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