Ferrari Mailing List: Re: SOLENOID VALVE

[pbennett (pbennett]

Question From: "Michel Savard" <mysavard [at] videotron.ca>
> > > 1981 308 GTSi: What's the use of the solenoid valve (Tav 9 #36 or Tav 12 
> > > #52)

328/308 parts manual:
Figure 9 show the emissions air pump system and part #36 controls the cutoff 
temperature for air blowing into the exhaust, turning it off until the 
engine warms up.  It is controlled by the temp sensor under the water 
expansion tank (as is the high idle rpm).

Figure 12 describes the EGR system which limits gas vapor leaking into the 
atmosphere.  In the passenger footwell there are catalytic temperature 
slow-down warning light controls next-to-which is an EGR controller gizmo 
which turns off power to part #52, the EGR electrovalve, limiting it's 
operation to engine speeds below 4400rpm.

Both electrovalves get +12v power from the ignition switch at left fuse #1.
Both electrovalves get ground power from their respective controllers.
An electrovalve controls air or vacuum flow electrically.

GL
p