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Secondaries? Bog?

Discussion in 'The Venerable Q-Jet' started by 68Rivi_In_Cali, Jan 9, 2009.

  1. 68Rivi_In_Cali

    68Rivi_In_Cali Well-Known Member

    Ok Ive been attempting to get my 68 Rivi Running like a champ. It has a
    1972 Buick 455 with a Jet Performance Stage 2 Q-jet.

    I adjusted the idle mixture screws out 2 full turns and it idles around 550 when warm. Is this too low?


    Well The main question, is @ wat point should the secondaries open, I tried adjusting the spring, it helped a bit, I can get the nice secondaries sound when Im in 1st gear right before it shift to 2nd. If I hit the gas after 2nd, it bogs and sounds sluggish. Is it the tension spring?

    Choke pull off?

    When starting the engine from cold, the choke tends to stay on for ever! until way after driving it.

    Anyone else have the same carb?
     
    68Rivi_In_Cali, Jan 9, 2009
    #1
  2. Schurkey

    Schurkey Silver Level contributor

    Is it adjusted 2 turns out because you read that's where it should be; or because you followed the tuning procedure and that's where it happened to end up--just a tiny bit lean from "best idle vacuum"?
    550 in gear, or in neutral? 550 in gear is "about" right; maybe a little low. If you aren't stalling or having other problems--I'd leave that alone.

    When they're needed.
    Maybe. Wouldn't have to be. There's plenty of other things that could cause it.

    Yeah, maybe.

    WHAT heats the choke coil? Is this a divorced choke with the coil attached to the intake manifold exhaust crossover? Do you have a FUNCTIONING heat riser/EFE valve? That exhaust crossover should be SCREAMING HOT soon after starting the engine. If it's merely "hot" the choke coil isn't being properly heated; so the choke will stay on a long time.

    The exhaust crossover in the intake manifold is known to plug with carbon; that reduces or stops exhaust flow and again the choke coil doesn't heat properly.
     
    Schurkey, Jan 10, 2009
    #2

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