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Secondary Tuning

Discussion in 'The Venerable Q-Jet' started by wildriv430, Dec 10, 2004.

  1. wildriv430

    wildriv430 low budget gearhead

    Ok i have another problem.....The secondaries snap open waaaaay to early when i punch it. So bad that the car will die if i dont let up. :af: They even snap open if you wing the engine in park, and the pipes blow black smoke.

    I dont know alot about quadrajets because i am mostly a mopar man and thus my limited knowledge lies with carters and holleys....But I have been told by some of my GM buddies that you are supposed to be able to adjust the secondary spring tension some how, they dont seem to know how either....

    Anyone care to enlighten me on how to do this? The few times ive driven the car since its been finished and put back on the road has been enough to make this problem really annoying. When the engine finally catches up with the dump of fuel it GETS UP AND GOES!! :3gears: :Brow: This is one of the reasons why i love buicks, you dont have to turn them fast to get tons of torque like most of the other guys....... cough...chevy..cough...ford cough......

    Thanks in advance,
    Marcus
     
    wildriv430, Dec 10, 2004
    #1
  2. SkylarkSteve

    SkylarkSteve Hello Michael

    On the passangers side of the carb next to the secondaires, there's a small rectangular protrusion, on the side of it is a small slotted screw and on the underside is an allen head screw. place an allen wrench in that screw and a small screw driver in the slotted one, loosen the allen head screw while holding the other screw. Turn the slotted screw clockwise to tighten up the secondaries, most people suggest about 1/8 of a turn at a time so you don't go too far. Then tighten the allen head screw. The allen head screw holds the other screw in place so you don't want to release the slotted one while the allen screw is loose because it will completly unwind and you'll lose any sort of reference tightness.
     
    SkylarkSteve, Dec 10, 2004
    #2
  3. LARRY70GS

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

    Check the airvalve wind up, like Steve described above. Also the primary choke vacuum break, on the passenger side front of the carb, also functions to slow down the opening rate of secondary air valves. Just take a look at it with the engine running. The link should be pulled in, and restricting air valve movement. With the engine running, you should not be able to push the air valves in by hand. If you can the vacuum break is bad or the linkage to the air valve shaft is missing or disconnected.
     
    LARRY70GS, Dec 10, 2004
    #3
  4. wildriv430

    wildriv430 low budget gearhead

    Thanks guys, I will try to make the adjustments when i get back home for x-mas. Hopefully the weather will be good enough to take the riv out on the road and test... :TU:
    The vaccum choke pull off is new so i know thats not the problem..... I probably accidently loosened the secondary spring all the way when i dissasembled the carb for rebuild, i didn't have a clue at that time as to what i was doing. :Dou:
     
    wildriv430, Dec 10, 2004
    #4

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