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  1. #1
    Experienced Lancista tangmonster's Avatar
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    High IDLE 1977 Beta saloon 2000

    Hi All

    Yesterday I picked up a very sad 1977 Beta saloon with a 2L engine.

    There is a LOOONG list of items to tackle. But first items are

    Sort out oil leak/s
    Sort out high idle and running very rich.



    I am very certain apart from the oil leak on the cam housing. Will need to replace all those gaskets. I have a vacuum leak.

    I just wanted to do a sanity check on previous people messing with car.

    In image above.

    It looks like my vehicle has the standard WEBER 34 DATR carb

    My understanding is that

    1) Primary idle jet ( this currently read 45)
    2) Primary emultion tube and main jet ( this currently reads 170)
    3) secondary emultion tube and jet ( this currently read 240)
    4) secondary idle jet? ( this currently reads 80)

    I just wanted to do a sanity check since i am worried someone swapped things.

    5) I am very confused by that pipe, It looks like a vacuum hose? But it connects to a small T next to the crank case breather on air filter.

    When I close this pipe while idling idle drops A LOT.

    Before I remove intake manifold and cam gear for new gaskets I just wanted to make sure I understand.

    also follow up question.

    The red wire running to what i understand is the Fuel cutoff solenoid. should this be energized with ignition on even if motor is not running?

  2. #2
    Legendary Lancista SubGothius's Avatar
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    Re: High IDLE 1977 Beta saloon 2000

    According to the Haynes manual, jetting for a 2000 engine 34 DATR should be:
    • Primary Idle Jet: 50
    • Primary Main Jet: 120
    • Primary Main Air: 170
    • Primary Main Emulsion: F.30
    • Secondary Idle Jet: 80
    • Secondary Main Jet: 150
    • Secondary Main Air: 240
    • Secondary Main Emulsion: F.30


    From what you described of that hose #5, it diverts crankcase vapors directly to the intake stream at the base of the carb, when the vacuum from that port is strong enough; otherwise at low port vacuum, vapors flow from the big hose into the air box at the top of the carb.

    The red wire to the fuel cutoff solenoid should be energized whenever the ignition key is on, regardless of whether the engine is running.
    Best regards,
    -Tye (1979 Lancia Beta Zagato spider)

    "In theory there's no difference between theory and practice, but in practice there is."
    -Jan L.A. van de Snepscheut

  3. #3
    Experienced Lancista tangmonster's Avatar
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    Re: High IDLE 1977 Beta saloon 2000

    Thanks for your help.

    It still confuses me how that pipe no 5 does not mess with idle mixture then? I suppose they simply factored it in with design.

    The idle mixture screw has half a turn between bottoming out and killing engine car idling at 2000RPM.

    But I am most likely chasing my tail and there must be a big vacuum leak somewhere.


    Removed carb last night and will be removing intake manifold and at least front cam box because it has a bad oil leak. ( brake booster hose was very loose fitting)

    Between replacing intake manifold gaskets ,new brake booster pipe , carb gasket and giving carb a good clean sorting oil leaks i'll revisit this in the next week or so when everything is together. most probably problem will be solved

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