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repetofndr

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Reply with quote  #1 
I just bought my 72 to be a daily driver. It had been sitting for a year or so before I bought it. It's all stock (except for 009 dizzy), 1600 DP, 53k miles. It runs well, idles smooth but has a major stumble off idle(34 pict/009). I figure a good carb cleaning or even a kit will help but I dont think it will cure the problem. I would really like to keep the stock air cleaner and keep the engine as stock as possible.
So FINALLY! the question!
Which would you change? the carb or the distributor?
I know that Air Cooled .net swears by their SVDA dizzy and if I could put in a Petronics in it it would probly solve the problem.
On the other hand I've seen a couple peaple on other web sights that have adapted the 30 PICT to their dual port and they claim it solves the problem also.
I might even consider a stock dizzy if I could find one.

What to do? All coments appriciated.

Pete

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Envious

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Reply with quote  #2 
By your description it sounds like a clogged idle jet. I would rebuild the carb. Those carbs are quite basic and easily rebuilt even by somebody without a lot of experience.

Swapping the distributor is something that you may want to invest in but is likely not causing the stumble you're describing. The new sva distributors are a great fix especially when installed with an electronic trigger like Pertronix.

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Wayne

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Reply with quote  #3 
There is a good article on Carb Maintenance by Rick Higgens from Bug Me Video here at the site. Give that a try and see what happens. It's probably due for a good clean out anyway.
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HippieRob

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Reply with quote  #4 
I'll post this here, too for the same problem as eratic idle, it might be the heat riser clogged with carbon. Air cooled VWs seemed to do that from what I hear. It should get hot and stay hot all the way across, I believe.
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repetofndr

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Reply with quote  #5 
Update: I cleaned and re-oiled the air cleaner and did the "$1.98" carb rebuild, thats where you rev it up to about 3k and then choke it off by hand. Big improvement! I also squirted everything down with carb cleaner and added fresh gas, more improvement. I also adjusted the idle and now it runs about as well as that carb/dizzy is likely to. Still a little hesitation but about what you would expect.
Once I get some wiper blades it goes to work when I do!
Pete

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68autobug

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Reply with quote  #6 
Pete,
You can adjust the accellerator pump on the carby.. its on the RHS .. a little lever with a spring..
If You adjust that, it will give You more fuel when You press the throttle down, and hopefully the flat spot will disappear... Have You tuned the 009 distributor to FULL advance with a timing light? You cannot tune the 009 statically on idle, it has to be with the engine running at full advanvce... about 32 degrees [from memory]
Also, the accellerator pump is the most likely part in a Solex carby to block up... I know Mine is blocked, from just sitting on the engine too long...
regards

Lee Noonan -- 68AutoBug -- Australia

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repetofndr

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Reply with quote  #7 
Thanks Lee,
I will definately look into those areas. I dont have a degreed pully so the timeing is a little less than precise. I do however have a friend that is a VW mechanic so I will enlist his help.
The more I tinker with this beast the more I like it. This is the first "stock" VW I have ever owned. My baja and dune buggy were already modified when I bought them. I like them a lot but they reqire a certain level of compromise, mostly at the expense of comfort and sreetability, to be as good at what they were built for as they are.
The baja in particular will amaze at its ability to go places in the desert that most people think is the sole realm of four wheel drives. On the otherhand with full cage and solid mounted engine its loud and drafty at highway speeds.
The dune buggy shines as a smile maker. People are really drawn to it. But to really enjoy it you need nice balmy weather and at 5000 plus feet of altitude I dont get nearly as much of that as most people probly think I do, living in Arizona.
Pete

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Dan

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Reply with quote  #8 
I've heard that when rebuilding your carb. it is a good idea to boil it for a few minutes in water first to get all the grime out. I will be rebuilding my carb. soon and plan to do this. Just won't use the same pot for pasta.:-)
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repetofndr

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Reply with quote  #9 
I've never heard of boiling but its sounds like it would work. Let us know how it works out.
The car is at the point now of being drivable and so I shall. There is room for improvement but I want to establish a baseline of gas mileage, "seat of the pants acceleration" ect. to work off of.
Its had its oil changed, points gapped, timing set, and will probly get new plugs and a petronics ign. module within a week or so.
I will keep everyone updated.
Pete

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68autobug

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Reply with quote  #10 
I haven't heard of boiling a carby before... but I have two Solex carbies that probably need doing. Both have been sitting for years. One does work, apart from the accelerator pump.. and it has been opened & cleaned..
So I might try that, and when You see the gunk inside a carby, its not easy to get it out...

Lee Noonan - 68AutoBug - Australia -

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