Air flow detection and some odd stuff | FerrariChat
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Air flow detection and some odd stuff

Discussion in '308/328' started by bvdp, Jan 20, 2008.

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  1. bvdp

    bvdp Karting

    May 30, 2007
    65
    Belgium
    Full Name:
    Bart vdp
    #1 bvdp, Jan 20, 2008
    Last edited by a moderator: Sep 7, 2017
    Did some maintenance yesterday. I noticed a brass pipe on the air filter house(see photo 2 and 3). Also a small red piece with two small pipes with nothing on it (photo 4). Any ideas what this is?
    Furthermore I need to replace my air flow detection (the bleu connection on photo 1, 2 and 3). Has anybody done this and has taken some pictures that will help me? A part number would be fine as well. Also an exploded view or manual.

    mvg Bart
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  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    BANNED Lifetime Rossa

    Jan 11, 2001
    26,822
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Jan 20, 2008
    Last edited by a moderator: Sep 7, 2017
    The brass fitting on your airbox (that is crimped closed) is used on US versions for the air injection systems (so it makes sense that it has been permanently closed on your euro 308QV) -- perhaps the airbox was replaced?

    The sensor with the red hose fittings on the thermostat housing is new to me. In the OMs (both euro and US), it is referred to as a "thermostatic valve" that has something to do with bleeding the cooling system. The 308QV euro SPC shows the simple threaded bleeding plug in that position that most 308 have (the jpeg shows a 1985 US 308QV with this simple plug). Perhaps it was a new idea to improve bleeding that just didn't work out (so they went back to the simple plug)?

    Have you confirmed that the blue safety switch on the airflow meter is itself "bad"? There are other problems with the fuel pump +12V power system that could be solved by unplugging the safety switch. (With engine off and key off) Measure the resistance between the two terminals on the safety switch -- should be closed (0 ohms or just a few ohms maximum) when the airflow metering plate is in the rest position, and open (infinite ohms) when the airflow metering plate is pushed downward a few millimieters. If you pass this test, the safety switch is OK, and you'll need to look elsewhere for the real problem. If you fail, the safety switch must be replaced.
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  3. bvdp

    bvdp Karting

    May 30, 2007
    65
    Belgium
    Full Name:
    Bart vdp
    #3 bvdp, Jan 20, 2008
    91tr, thank you for the info. My car is a euro QV , imported from Swiss. I know the car has been in the US but have no idea when and how long. So it is possible that some modifications show a US-hand.
    I did some tests with the safety switch. The odd thing is that with a cold engine it is working perfect. When the engine is warm, the fuelpump relay starts switching on and off, espacially when I am slowing down (yes, sometimes you have to). It seems to me something is wrong with the switch or the mechanism. Can not find info about it though.

    mvg Bart
     
  4. flyingboa

    flyingboa Formula 3

    Nov 27, 2003
    1,564
    Italy
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    Eugenio Dalla Rosa
    #4 flyingboa, Jan 20, 2008
    Bart,
    just a word of warning. Swiss spec for 328 is completely different from euro spec, much more closer to US than to euro. I do not know if the same applies to 308QV, but perhaps it is worth a closer look.
    Ciao
    Eugenio
     
  5. bvdp

    bvdp Karting

    May 30, 2007
    65
    Belgium
    Full Name:
    Bart vdp
    #5 bvdp, Jan 20, 2008
    Flyingboa,

    I had my local dealer check my VIN number. It is orginally an european car. He told me that the car has been in the US but was imported back to europe. It has been in Swiss for some time before I bought it. In Belgium we have a 'gelijkvormigheidsattest'; a paper that proves that the car is original and not modified. I could not get such a paper from Ferrari because they were sure the car had been in the US and they did not know if it was modified or not. So I had the car measured and completily checked by an official compagny. They also came to the conclusion it was an european car without significant modifications.
    Nevertheless I am very interested in your opinions. It is the only and first Ferrari I have so I have nothing to compare with. I was searching for an oldtimer to buy and it happened to become a Ferrari. So I have to learn a lot about it. I have some knowledge about cartechnics however so that will help.

    mvg Bart
     
  6. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    BANNED Lifetime Rossa

    Jan 11, 2001
    26,822
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #6 Steve Magnusson, Jan 20, 2008
    Sorry, I can't help further with the safety switch details (mechanical adjustment, replacement, etc.) -- my mistress is KE-Jet and doesn't use the safety switch. My guess would be that the Mondial8 WSM might have something (1st F model with K-Jet).
     
  7. bvdp

    bvdp Karting

    May 30, 2007
    65
    Belgium
    Full Name:
    Bart vdp
    #7 bvdp, Feb 16, 2008
    Thanks for the info. I will go to a Bosch specialist to get this item done.
    I hope they still know something about Kjetronic.

    mvg Bart
     
  8. Brian Harper

    Brian Harper F1 Rookie
    Owner Silver Subscribed

    Feb 17, 2006
    4,078
    San Jose area
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    Brian Harper
    #8 Brian Harper, Feb 16, 2008
    The two red hose port on the thermostat housing is a common Bosch part used on Jettronic systems. I've never seen one on a Ferrari, I have seen them on other cars. You will find it allows vacuum through it depending on temperature. Whatever it was controlling was probably removed when it crossed an ocean.
     
  9. miketuason

    miketuason F1 World Champ
    Owner Silver Subscribed

    Feb 24, 2006
    15,811
    Cerritos, CA.
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    Mike
    #9 miketuason, Feb 16, 2008
    Steve, I don't think the brass fittings is use on a US Version air injectors, none of the US version I've seen never had that.
    I think somebody added that on for for an extra vacuum port.
     

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