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    Thread: 1969 Bug doesn't idle... a simple problem?

    1. Member inlovewithavdubengine's Avatar
      Join Date
      Sep 1st, 2011
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      Gilroy, CA
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      1991 VW Cabriolet (2.0L 8v 5-spd); 2000 Honda Civic CX (1.7L 16v 5-spd)
      07-24-2012 01:47 AM #1
      Helping my friend with her bug again:



      Basically, the problem is that it does not want to idle. I'm pretty sure it's a simple problem related to the throttle, "strangler valve," or one of those levers. I've been working on adjusting the little screws and stuff (fig. 1,2, & 3) with mixed results.


      I had it idling for a while at a high rev and then tried adjusting screws 1 and 2 and it stopped idling, then I couldn't get it back. That's when I decided to hit up the forum for advice.



      See the thing circled in green? Looks like its threaded and something is supposed to go in there. Maybe not. Huh.

      Anyway I'm not very experienced with Beetles, any help is much appreciated. Danke.
      "The ultimate test’s always your own serenity. If the machine produces tranquility it’s right. If it disturbs you it’s wrong until either the machine or your mind is changed." - Zen and the Art of Motorcycle Maintenence

    2. Member LooseNuts's Avatar
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      57 Lowlight B7
      07-24-2012 10:01 AM #2
      first off i will say. This is how you post a question. very nice

      second please save yourself some much trouble "fire" and relocate your fuel filter out of the engine compartment please.

      as for adjusting your carb. i will let an expert handle that one. but i can provide this link
      http://www.vw-resource.com/34pict3.html

      it could be that the distributor is out of time as well
      J
      Quote Originally Posted by WideFive
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      ACW's aren't a watercooled APPLIANCE,it's a classic air cooled pile that takes money,patience and attitude to own it.
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    3. Member inlovewithavdubengine's Avatar
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      1991 VW Cabriolet (2.0L 8v 5-spd); 2000 Honda Civic CX (1.7L 16v 5-spd)
      07-24-2012 05:01 PM #3
      Good link. I'll keep trying. Still trying to wrap my mind around all the physics involved on this one
      "The ultimate test’s always your own serenity. If the machine produces tranquility it’s right. If it disturbs you it’s wrong until either the machine or your mind is changed." - Zen and the Art of Motorcycle Maintenence

    4. Member
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      07-26-2012 01:25 AM #4

      Quote Originally Posted by inlovewithavdubengine View Post
      Good link. I'll keep trying. Still trying to wrap my mind around all the physics involved on this one
      Quote Originally Posted by LooseNuts View Post
      first off i will say. This is how you post a question. very nice

      second please save yourself some much trouble "fire" and relocate your fuel filter out of the engine compartment please.

      as for adjusting your carb. i will let an expert handle that one. but i can provide this link
      http://www.vw-resource.com/34pict3.html

      it could be that the distributor is out of time as well


      Dayo in ,
      Please read all the way through all of these links:
      http://www.chircoestore.com/catalog/...p?topic=4599.0
      http://www.chircoestore.com/catalog/...p?topic=4963.0
      http://www.chircoestore.com/catalog/...p?topic=4374.0
      http://www.chircoestore.com/catalog/...p?topic=3436.0
      http://www.chircoestore.com/catalog/...p?topic=5386.0
      http://www.chircoestore.com/catalog/...p?topic=3840.0

      The MAIN problem is that you moved the #2 screw you called out in your pic here:

      Once that screw moved all other adjustments depending on it's proper placement become ineffective .(See ,there's supposed to be a cap on it(#50A) like shown in the diagram below specificly put there to keep you from turning the screw(#18) on the throttle lever(#14) after initially presetting the lever's position.)

      Accchhh!,& this

      http://www.chircoestore.com/catalog/...p?topic=7772.0 .
      (continuing tonight )
      What Rick was talking about there was the Idle Cutoff Valve(#37),what you're showing in is the hole for the Pilot Jet(#40)

      which in effect is the idle jet for this carb:
      http://www.vw-resource.com/jets.html
      from
      http://www.vw-resource.com/vw-resour...=1&zoom_sort=0 .
      If that hole was just left open to the carb throat you're just getting unmetered spurts of fuel as vacuum increases when the throttle snaps shut .
      If that hole has been closed off then you're getting NO fuel through the idle circuit at all .
      Also pop the aircleaner off with the engine not running,look down into the throat & pull the throttle lever open,you should be able to see a solid short time stream of fuel from the Accelerator Pump Nozzle(#10) .

      If these steps don't pretty easily get it running like a top then I'd strongly urge you to consider planting a much fresher if not brand new carb on it:
      http://www.chircoestore.com/catalog/...oducts_id=1262
      from
      http://www.chircoestore.com/catalog/...u9n6&x=15&y=10
      otherwise it'll continue to oscillate between lean & rich running conditions which'll just longterm destroy the engine from the inside out .


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