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Restoring a 71 Vert



 
 
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  #1  
Old March 8th 12, 03:34 PM posted to rec.autos.makers.vw.aircooled
esowash
external usenet poster
 
Posts: 4
Default Restoring a 71 Vert

Hello new friends-

I'm restoring a 1971 Super Vert, and I'm having some engine trouble.
Hoping you find citizens will be able to provide some insight.

I've set the points and the timing...but when the engine warms, he
won't idle. If I manually choke the engine (by closing the butterfly)
he'll idle happily.

If I advance the timing by about 80 degrees (!!!) and crank the Fast
Idle screw in real far, he'll idle again, albeit a bit high. On the
road, though, he's all out of things to talk about at 35mph.

Adjusting the Bypass and Volume Control screws don't seem to do
anything. I've screwed both all the way in and he behaves the same.

Thoughts? I'm pulling the carb off this weekend for a thorough
cleaning.
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  #2  
Old March 9th 12, 04:24 AM posted to rec.autos.makers.vw.aircooled
Jan Andersson[_4_]
external usenet poster
 
Posts: 467
Default Restoring a 71 Vert

On 3/8/2012 9:34 AM, esowash wrote:
> Hello new friends-
>
> I'm restoring a 1971 Super Vert, and I'm having some engine trouble.
> Hoping you find citizens will be able to provide some insight.
>
> I've set the points and the timing...but when the engine warms, he
> won't idle. If I manually choke the engine (by closing the butterfly)
> he'll idle happily.
>
> If I advance the timing by about 80 degrees (!!!) and crank the Fast
> Idle screw in real far, he'll idle again, albeit a bit high. On the
> road, though, he's all out of things to talk about at 35mph.
>
> Adjusting the Bypass and Volume Control screws don't seem to do
> anything. I've screwed both all the way in and he behaves the same.
>
> Thoughts? I'm pulling the carb off this weekend for a thorough
> cleaning.



Before carb tuning, you need to have three things done: ignition timing,
points gap, and valve adjustment. You only have one more to do. Assuming
it's a stock engine with aluminum pushrods, set valve lash at 0.15mm
(0.006") cold. That's overnight, stone cold.

Cleaning out the carburetor is a very good step to take before trying to
adjust it. Sounds like you may have a clogged idle jet or dirt in the
passage behind it.

Set the ign advance to 7.5 degrees advanced at idle (when you get it to
idle) if you have a single vacuum distributor (only one vacuum port in
the vacuum canister, not two).

When it's time to tackle the carb adjustment, here's a good how-to:

http://www.vw-resource.com/34pict3.html

Check that site inside and out, good info there.

If you have trouble getting it to run right, ask more help here.... it's
a quiet board these days and we would welcome new discussion.

Also, a picture of your engine bay would be nice, just to see if
something is out of place or hooked up wrong. Do not post pictures in
this group, instead upload them to an online internet service like
Photobucket.com or similar free picture site, and provide us with a link
to it.

Jan




  #3  
Old March 9th 12, 04:28 AM posted to rec.autos.makers.vw.aircooled
Jan Andersson[_4_]
external usenet poster
 
Posts: 467
Default Restoring a 71 Vert

On 3/8/2012 10:24 PM, Jan Andersson wrote:
> On 3/8/2012 9:34 AM, esowash wrote:
>> Hello new friends-
>>
>> I'm restoring a 1971 Super Vert, and I'm having some engine trouble.
>> Hoping you find citizens will be able to provide some insight.
>>
>> I've set the points and the timing...but when the engine warms, he
>> won't idle. If I manually choke the engine (by closing the butterfly)
>> he'll idle happily.
>>
>> If I advance the timing by about 80 degrees (!!!) and crank the Fast
>> Idle screw in real far, he'll idle again, albeit a bit high. On the
>> road, though, he's all out of things to talk about at 35mph.
>>
>> Adjusting the Bypass and Volume Control screws don't seem to do
>> anything. I've screwed both all the way in and he behaves the same.
>>
>> Thoughts? I'm pulling the carb off this weekend for a thorough
>> cleaning.

>
>
> Before carb tuning, you need to have three things done: ignition timing,
> points gap, and valve adjustment. You only have one more to do. Assuming
> it's a stock engine with aluminum pushrods, set valve lash at 0.15mm
> (0.006") cold. That's overnight, stone cold.
>
> Cleaning out the carburetor is a very good step to take before trying to
> adjust it. Sounds like you may have a clogged idle jet or dirt in the
> passage behind it.
>
> Set the ign advance to 7.5 degrees advanced at idle (when you get it to
> idle) if you have a single vacuum distributor (only one vacuum port in
> the vacuum canister, not two).
>
> When it's time to tackle the carb adjustment, here's a good how-to:
>
> http://www.vw-resource.com/34pict3.html
>
> Check that site inside and out, good info there.
>
> If you have trouble getting it to run right, ask more help here.... it's
> a quiet board these days and we would welcome new discussion.
>
> Also, a picture of your engine bay would be nice, just to see if
> something is out of place or hooked up wrong. Do not post pictures in
> this group, instead upload them to an online internet service like
> Photobucket.com or similar free picture site, and provide us with a link
> to it.
>
> Jan
>



oh yea, as the article says, look for vacuum leaks. Especially at the
intake manifold rubber boots.


  #4  
Old March 12th 12, 03:18 PM posted to rec.autos.makers.vw.aircooled
esowash
external usenet poster
 
Posts: 4
Default Restoring a 71 Vert

Thanks for the info. The carb cleaning went well, and it certainly
needed it...the O-rings on the volume control and bypass screws were
so worn they might as well have not been there. Otherwise, it was just
filthy.

When I pulled the valve cover off on the passenger side to set the
valves, I discovered that one of them had slipped out from under the
rocker arm. I figured that was kind of a big deal, and was able to
easily wrestle it back into place.

The timing still needs some work apparently, but engine performance
and behavior is definitely improved. I clocked myself at a blistering
50mph on a test drive, but at the top of each gear (higher RPMs) it
got very missy. I think this is still a timing issue, but I also
determined after getting a face full of fuel, that my gas is a little
stale, and this will skew my tuning efforts.
  #5  
Old August 2nd 12, 06:10 PM posted to rec.autos.makers.vw.aircooled
Mr. K[_2_]
external usenet poster
 
Posts: 32
Default Restoring a 71 Vert

In article >,
Jan Andersson > wrote:

> On 3/8/2012 10:24 PM, Jan Andersson wrote:
> > On 3/8/2012 9:34 AM, esowash wrote:
> >> Hello new friends-
> >>
> >> I'm restoring a 1971 Super Vert, and I'm having some engine trouble.
> >> Hoping you find citizens will be able to provide some insight.
> >>
> >> I've set the points and the timing...but when the engine warms, he
> >> won't idle. If I manually choke the engine (by closing the butterfly)
> >> he'll idle happily.
> >>
> >> If I advance the timing by about 80 degrees (!!!) and crank the Fast
> >> Idle screw in real far, he'll idle again, albeit a bit high. On the
> >> road, though, he's all out of things to talk about at 35mph.
> >>
> >> Adjusting the Bypass and Volume Control screws don't seem to do
> >> anything. I've screwed both all the way in and he behaves the same.
> >>
> >> Thoughts? I'm pulling the carb off this weekend for a thorough
> >> cleaning.

> >
> >
> > Before carb tuning, you need to have three things done: ignition timing,
> > points gap, and valve adjustment. You only have one more to do. Assuming
> > it's a stock engine with aluminum pushrods, set valve lash at 0.15mm
> > (0.006") cold. That's overnight, stone cold.
> >
> > Cleaning out the carburetor is a very good step to take before trying to
> > adjust it. Sounds like you may have a clogged idle jet or dirt in the
> > passage behind it.
> >
> > Set the ign advance to 7.5 degrees advanced at idle (when you get it to
> > idle) if you have a single vacuum distributor (only one vacuum port in
> > the vacuum canister, not two).
> >
> > When it's time to tackle the carb adjustment, here's a good how-to:
> >
> > http://www.vw-resource.com/34pict3.html
> >
> > Check that site inside and out, good info there.
> >
> > If you have trouble getting it to run right, ask more help here.... it's
> > a quiet board these days and we would welcome new discussion.
> >
> > Also, a picture of your engine bay would be nice, just to see if
> > something is out of place or hooked up wrong. Do not post pictures in
> > this group, instead upload them to an online internet service like
> > Photobucket.com or similar free picture site, and provide us with a link
> > to it.
> >
> > Jan
> >

>
>
> oh yea, as the article says, look for vacuum leaks. Especially at the
> intake manifold rubber boots.


yes, that was my first thought. Some spray carefully something around
various suspicious joints and see what happens.
--
Karma, What a concept!
 




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