What does this part do? | FerrariChat
Buy

What does this part do?

Discussion in '308/328' started by GT4fore, Jun 3, 2009.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. GT4fore

    GT4fore Karting

    Dec 7, 2006
    102
    Mt. Airy, Maryland
    Full Name:
    Gary
    #1 GT4fore, Jun 3, 2009
    Last edited by a moderator: Sep 7, 2017
    Need some help from the geniuses. Parts are from my CIS 1980 308. I was the process of cleaning all the extraneous parts in the engine compartment and replacing the hoses. I know that the part on the left is the fast idle air valve, what does the part on the right do? Can I eliminate both parts?

    Thanks in advance,

    GT
    Image Unavailable, Please Login
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,876
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Jun 3, 2009
    The part on the right is the Auxillary Air Valve (AAV) -- it allows some extra air into the engine when cold (and it should not be eliminated IMO).
     
  3. 2NA

    2NA F1 World Champ
    Consultant Owner Professional Ferrari Technician

    Dec 29, 2006
    18,221
    Twin Cities
    Full Name:
    Tim Keseluk
    #3 2NA, Jun 3, 2009
    Looks like a supplementary air valve. You might have trouble getting it to start without it.
     
  4. GT4fore

    GT4fore Karting

    Dec 7, 2006
    102
    Mt. Airy, Maryland
    Full Name:
    Gary
    #4 GT4fore, Jun 3, 2009
    Steve - 2NA,

    Thanks for the info, I'll order new aluminum hoses from a non-cat equipped Ferrari and eliminate the fast idle air valve leaving the AAV circuit intact.

    FWIW - With both circuits eliminated, the car starts fine but seems to be quite rich when cold- makes sense now.

    -GT



     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,876
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #5 Steve Magnusson, Jun 3, 2009
    One thing you might consider is to just block off one of the air hoses going to the cold start air valve with a short section of wooden dowel and then drill a small hole in the center that you enlarge until you get a reasonable cold start RPM -- that way it all looks "original" (but doesn't go to such a high cold RPM).
     

Share This Page