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Choke Pull-Off

Discussion in 'The Venerable Q-Jet' started by 70Riviera, Mar 17, 2007.

  1. 70Riviera

    70Riviera Newbie

    Hello, im new to the whole car thing my first car a 70 Riviera, my question is about the choke pull-off on my carb, its all screwd up so i bought a new one told them the year and model, they gave me the choke for the 70 rivi carb i did some reading here, went to the site that you put in the number and gives info about the carb, says its from a 1973 buick (7043240), is ok to use the choke pull-off i got? or should i return it and get one that is for a 1973 carb?

    This is the choke i got
    http://www.partsamerica.com/ProductDetail.aspx?MfrCode=NIE&MfrPartNumber=FS3

    Also when i turn off the car it seems to want to continue to stay on, it shakes and it takes a couple seconds to turn off, then a loud air release noise happens before it turns off, any ideas of what it could be? and what i should do about it?

    any tips, or do's and don'ts before i replace the choke would be greatly appreciated. :TU:
     
    70Riviera, Mar 17, 2007
    #1
  2. Schurkey

    Schurkey Silver Level contributor

    1. Always buy carb parts by telling them the carb number. The pulloff you have MAY be the same as what you need--but I'd have the parts store verify that.

    2. Run on is nearly always caused by a too-fast idle speed. What is the idle speed of your engine, and does it have an idle stop solenoid?
     
    Schurkey, Mar 18, 2007
    #2
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Which choke pull off are we talking about, front or rear? The front ones are mostly all the same. It is the most important one since it also slows the opening of the airvalves. With a defective one, there is a bog. It's really easy to test them, with vacuum applied, they either suck in or not.

    Your engine is suffering from run on, or dieseling. Most common cause is idle speed that is too fast. And the most common cause of that is not enough initial timing.
     
    LARRY70GS, Mar 18, 2007
    #3
  4. RAbarrett

    RAbarrett Well-Known Member

    A couple of things to consider. The choke pull off typically controls the rate at which the air valves open as well. This difference is typically controlled by the size of the opening in the pull-off. The adjustment will typically be the same, as the engine's requirement for cold fuel typically does not change. Ray
     
    RAbarrett, Mar 19, 2007
    #4

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