Ferrari Mailing List: Idle

[Rick Lindsay (rolindsay]

Hey Friends,

Techno question:  My '79 308GTB doesn't like to return to idle with the air 
cleaner on!  It does just fine with it off.  The behavior is just like a vacuum 
leak - which is what I assumed and just replaced the heat insulators with new, 
as they have integral gaskets.  Problem is still there.  That said, the car is 
quite drivable and runs like a scalded dog, but the 'return to idle' is slow 
and often never makes it all the way down to 1000rpm.

Advice?

-rick