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My Thermoquad sucks!

Discussion in 'Carter' started by 70gsrick, Sep 26, 2004.

  1. 70gsrick

    70gsrick 1 of 66

    The secondaires won't open! :rant: This isn't the first time this has happened. Sometimes they work and sometimes they don't :Do No: The butterflies won't move when the motor is running. But when you shut it off they are loose and move freely :af: !
    Like I say this is an intermittent problem and has been for the last year or so.
    Is it a vacuum problem?. :spank:

    HELP!
     
  2. 70gsrick

    70gsrick 1 of 66

    TTT

    Anyone?
     
  3. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    Does your carb have a choke?

    On the Qjet there is a part in the choke linkage that will actually stop the secondaries from opening if it is not warmed up fully. Could this be your problem? Sticky linkage?
     
  4. 70gsrick

    70gsrick 1 of 66

    Yes, it does have a choke and it seems to open all the way. I was outside looking at the choke and I don't think the choke pulloff is working. So what the heck does the choke pulloff do?
     
  5. doc

    doc Well-Known Member

    thermoquad or qjet????????????

    The post says thermoquad but Adam is talking about a qjet. They are 2 very different carbs. Are you guys on the same page?? :Do No: The thermoquads developed a reputation for the plastic center casting heat warping which caused unresolvable problems. my2cents worth. :grin:
     
  6. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I know, but I was referring to the choke. I don't know how different these carbs are in that area, which is why I was trying to throw out ideas.
     
  7. D BERRY

    D BERRY 72 Skylark 2 DR POST

    Is your Thermo Quad one of the race carbs or one of the OEM carbs? Also is it the butterflies that won't move or the secondary air door above the secondaries? The OEM carbs have linkage on the side of the carb opposite of the choke that won't allow the secondaries to open unless the choke is completely open. Check that and if it's your problem you could perform a little surgery and eliminate the problem, although if you get on it to quickly it might be bog city. HTH :TU:

    Dave Berry
     
  8. 70gsrick

    70gsrick 1 of 66

    Thanks for the info guy's, It does seem to be a choke problem, They never open when it's cold, but cold here is 105 deg in my garage!
    Yes dave it is one of the OEM setups I think. I'll throw up a couple of pics in a few minutes. and maybe you can tell me what to try? What your saying is making sense!
    :TU:
     
  9. 70gsrick

    70gsrick 1 of 66

    The carb...Please excuse my mess. I haven't had a chance to clean the mess the body shop made :af:
     

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  10. 70gsrick

    70gsrick 1 of 66

    #2
     

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  11. 70gsrick

    70gsrick 1 of 66

    #3
     

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  12. 70gsrick

    70gsrick 1 of 66

    Last one, of the choke side
     
  13. 70gsrick

    70gsrick 1 of 66

    Sorry
     

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  14. 87GN_70GS

    87GN_70GS Well-Known Member

    On the choke side, the round thingy with a vacuum hose attached at the back and linkage that goes up at a 45 deg angle to the secondary air valve, that is the choke pulloff. You'll noticed that when the engine is running and cold, engine vacuum will pull the diaphragm and rod, preventing the secondaries from opening.
     
  15. 70gsrick

    70gsrick 1 of 66

    So if I pull the hose off and plug it will the secondaries be free to move? or will that cause other problems?
     
  16. 70gsrick

    70gsrick 1 of 66

    Thanks for the ideas Adam.
    :TU:
     
  17. 1nastygs

    1nastygs Active Member

    On the drivers side of the carb, there is a secondary lockout connected to the choke's fast idle linkage that prevents the secondaries from opening if the choke is on but also if the linkage isn't adjusted properly.You can bend the tab so the secondaries will come in regardless of both. I also have some old Carter service instructions that goes thru the basic settings of all the linkages,accelerator pump,secondaries, etc. that I could copy and fax or mail to you.
    Thanks and good luck,
    Mike Villamor
     
  18. 70gsrick

    70gsrick 1 of 66

    That's awesome, I'll go out and work on it in the morning. I'd love to have the tuning info. I'd be glad to pay you for your trouble.
    :TU: :beer

    You guys are the best...I'll update if I figure it out!!

    Thanks
     
  19. 1nastygs

    1nastygs Active Member

    Rick,just send me an email with a fax # or an address and I will send some info out.
    Thanks,Mike
     
  20. 70gsrick

    70gsrick 1 of 66

    Hey Mike. You can fax it to 320-306-3153. Thanks :beer
     

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