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Carby troubles
Beetle426 - August 15th, 2004 at 10:51 AM

Hi,
It's probably been answered before but i have a major flat spot in my carb! When it happens i just play with the accelerator pedal and off it goes.By then i have to change gear! It's the standard carby off a 1600cc (1972).I've read i should buy a 2 barrel weber? If so how much and where do you get them?:cry


68AutoBug - August 15th, 2004 at 11:28 AM

if You buy a two barrel Carburetor, You will need a different inlet manifold, to fit the carburetor.
Weber used to make a carby that fitted straight onto the standard VW inlet manifold..
What carburetor are You using?? Solex 34PICT3 ??
You can fix the problem by adjusting the accelerator pump on the Solex carburetors, so they squirt more fuel into the manifold... this condition is usually caused mainly by the Bosch 009 distributor....
It works on revs, NO revs, No Go...
If You had an original VW Vacuum/centrifugal distributor You wouldn't have any problems...
There are people using all sorts of carburetors on this forum..
So, most carbies can be adapted....
My Son runs a Holley Bugspray carburetor and inlet manifold, plus bosch 009 distributor...
and His car really goes, but at the expense of more fuel...
It is a dual throat carburetor....

Lee -


barls - August 15th, 2004 at 11:56 AM

the most coomon mod for this is the 30/31 pic carb fitted with an adaptor plate which uses the standard manifold. alternatively fit a twin barrel progessive which has both power and ecconomy but uses slightly more fuel than standard but has more power


Beetle426 - August 15th, 2004 at 07:32 PM

Thanks guys,
Yes, the carby is a Solex 34PICT .. one. I'll try adjusting the accelerator pump on the carby(have to look at the vw book for idiots) and see what happens.I just want it to run smooth.Yes i had a 009 but i put a electronic dizzy(Scorcher) that i bought for my past failed dream of a big HP bug engine! Thanks again.


Bizarre - August 15th, 2004 at 08:27 PM

Here is a link for adjusting your carb

http://www.geocities.com/aussiebug1970/acclrtr3.html 

read a couple of the other stories as well

Make sure everything else is perfect first or you could just be masking another problem.
Pict carbs are a bushed carb in the butterfly shaft. These wear and suck air - leaning it out. If the butterfly is loose your carb is stuffed.
Also things like cracked manifold boots can cause air leaks and flat spots.

Anyway