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Old October 8th 07, 12:27 PM posted to rec.autos.makers.vw.aircooled
Bill Spiliotopoulos
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Posts: 157
Default Dies at idle...do I need I new carburator?

Another thing,

Do you have a 1300 or 1600 cc engine?
The 34-PICT or replacement carbs are jetted for a 1600cc engine.
If your engine is a 1300 dual port fitted with a 34-pict 3 carb you may have
to switch the idle jet of the new carb with a larger one to make it idle
properly, because the 1300 has less manifold vacuum at idle than the 1600.

Bill Spiliotopoulos,
'67 Bug.

"Macsoft" > wrote in message
...
> In article . com>
> > wrote:
>> On Oct 5, 11:20 am, "Bill Spiliotopoulos" > wrote:
>>> The idle problem doesn't connect necessarily to the pulled thread
>>> of the carburetor stud.

>
>>> Anyway, first you have to fix the stud, as this is a more serious
>>> problem. You have to buy a helicoil insert to repair 8x1.5 mm metric
>>> thread (I'm not 100% sure if it is a 8x1.5, please someone verify
>>> this), a special tap and a special diameter drill to enlarge the
>>> hole. The tap, the drill and some helicoil inserts are usually sold
>>> as a set, at a reasonable price. Don't go for a complete set which
>>> has many different sizes, as it will be very expensive.

>
>>> You need first to remove the faulty stud from the carb. Use two
>>> nuts locked together, to unscrew the stud from the carb body. Then
>>> use the special drill to enlarge the hole and tap it with the
>>> special tap. Then screw the helicoil insert with the tongue-side in,
>>> using a small flathead screwdriver that fits by the tongue. Use
>>> thread locking fluid on the helicoil. Then screw the stud in the
>>> helicoil, and you are done.

>
>>> About the idle problem.
>>> Dying at idle means the idle circuit is not working.
>>> Either the electromagnetic cut-off valve is defective or not
>>> getting power (it must click when you toggle the ignition switch on
>>> and off).
>>> Or the idle jet or idle circuit passages are blocked. You need to
>>> dismantle the carb and use compressed air to clean the idle circuit.

>
>>> The only reason to ditch a carb is if the throttle shaft bushings
>>> are excessively worn and you can't find anybody to get it rebushed
>>> at a reasonable price, or if it is bent / cracked / corroded. Not
>>> idling is not a reason to replace a carb.

>
>>> Bill Spiliotopoulos,
>>> '67 Bug.

>
>> I'm thinking the idle problem could be the pulled stud.
>> If the carb doesn't bolt down good, couldn't you be sucking in some
>> air around the gasket and/or base of the carb ? Might also warp
>> thebottom of the carb ?

>
>> Randy

>
> I've grinded the bottom of the carburator to even it out, tried to
> tighten itthe best I could with the resorces I have... Still no
> success.
> Went to the store and they told me they get me a new carburator for
> 140 euros (~140 dollars), and that is one of the best problem solvers
> I could buy for my vw. Millage, problems, etc. I'm tempted... to tired
> of working on the car,and not enough driving it.
> The carburator they have is one of those brasilian ones. Any toughts
> on those? Mineis really tosted...
>
> Thanks
> MM
> '70 1300 bug
>
>
> --
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