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Electronic ignition dizzy question



 
 
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  #1  
Old August 28th 07, 06:32 PM posted to rec.autos.makers.vw.aircooled
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Posts: 7
Default Electronic ignition dizzy question

I am looking at a '70 beetle. It has a vacuum advance dizzy with
electronic ignition which I am not familiar with instead of points and
condensor. I can't tell the make. While checking the advance with
the homemade Muir lamp I noticed it stayed lit dimly all the way
around the clock until it got to about 7.5 and then lit up fully. Is
this normal for electric ignitions?

The engine takes takes about 6 seconds to catch although all the tune
up settings are good. It idles fine but has an intermittent miss at
speed.

David

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  #3  
Old August 29th 07, 02:00 AM posted to rec.autos.makers.vw.aircooled
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Posts: 7
Default Electronic ignition dizzy question

On Aug 28, 4:30?pm, Speedy Jim > wrote:
> wrote:
> > I am looking at a '70 beetle. It has a vacuum advance dizzy with
> > electronic ignition which I am not familiar with instead of points and
> > condensor. I can't tell the make. While checking the advance with
> > the homemade Muir lamp I noticed it stayed lit dimly all the way
> > around the clock until it got to about 7.5 and then lit up fully. Is
> > this normal for electric ignitions?

>
> > The engine takes takes about 6 seconds to catch although all the tune
> > up settings are good. It idles fine but has an intermittent miss at
> > speed.

>
> > David

>
> That's probably normal leakage thru the electronics.
>
> The long cranking may have nothing to do with the spark;
> more likely slight flooding.
>
> If the miss occurs at odd times under load, inspect every
> push-on terminal in the Coil circuit for looseness.
> Then check the distributor advance plate for the tiny
> braided pigtail lead. If broken, the pigtail won't
> provide proper grounding as the advance plate rotates.
>
> Speedy Jimhttp://www.nls.net/mp/volks/


Thanks so much! I'll check those items tomorrow. The mosquitos were
too fierce this evening.
David

  #4  
Old August 29th 07, 11:03 AM posted to rec.autos.makers.vw.aircooled
John[_28_]
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Posts: 359
Default Electronic ignition dizzy question

When semiconductors fail (particularly in a stressed circuit like ignitions)
they do so catastrophically
and either go completely short circuit or open circuit. There is no half
way. Obviously the output
transistor is working as you noticed the lamp come on at 7.5. The circuitry
does take a little current
to work so its almost certainly as the Speedy suggests.
John
> wrote in message
ups.com...
> On Aug 28, 4:30?pm, Speedy Jim > wrote:
>> wrote:
>> > I am looking at a '70 beetle. It has a vacuum advance dizzy with
>> > electronic ignition which I am not familiar with instead of points and
>> > condensor. I can't tell the make. While checking the advance with
>> > the homemade Muir lamp I noticed it stayed lit dimly all the way
>> > around the clock until it got to about 7.5 and then lit up fully. Is
>> > this normal for electric ignitions?

>>
>> > The engine takes takes about 6 seconds to catch although all the tune
>> > up settings are good. It idles fine but has an intermittent miss at
>> > speed.

>>
>> > David

>>
>> That's probably normal leakage thru the electronics.
>>
>> The long cranking may have nothing to do with the spark;
>> more likely slight flooding.
>>
>> If the miss occurs at odd times under load, inspect every
>> push-on terminal in the Coil circuit for looseness.
>> Then check the distributor advance plate for the tiny
>> braided pigtail lead. If broken, the pigtail won't
>> provide proper grounding as the advance plate rotates.
>>
>> Speedy Jimhttp://www.nls.net/mp/volks/

>
> Thanks so much! I'll check those items tomorrow. The mosquitos were
> too fierce this evening.
> David
>



  #5  
Old August 29th 07, 02:56 PM posted to rec.autos.makers.vw.aircooled
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Posts: 7
Default Electronic ignition dizzy question

On Aug 29, 6:03?am, "John" > wrote:
> When semiconductors fail (particularly in a stressed circuit like ignitions)
> they do so catastrophically
> and either go completely short circuit or open circuit. There is no half
> way. Obviously the output
> transistor is working as you noticed the lamp come on at 7.5. The circuitry
> does take a little current
> to work so its almost certainly as the Speedy suggests.
> > wrote in message
>
> ups.com...
>
>
>
> > On Aug 28, 4:30?pm, Speedy Jim > wrote:
> >> wrote:
> >> > I am looking at a '70 beetle. It has a vacuum advance dizzy with
> >> > electronic ignition which I am not familiar with instead of points and
> >> > condensor. I can't tell the make. While checking the advance with
> >> > the homemade Muir lamp I noticed it stayed lit dimly all the way
> >> > around the clock until it got to about 7.5 and then lit up fully. Is
> >> > this normal for electric ignitions?

>
> >> > The engine takes takes about 6 seconds to catch although all the tune
> >> > up settings are good. It idles fine but has an intermittent miss at
> >> > speed.

>
> >> > David

>
> >> That's probably normal leakage thru the electronics.

>
> >> The long cranking may have nothing to do with the spark;
> >> more likely slight flooding.

>
> >> If the miss occurs at odd times under load, inspect every
> >> push-on terminal in the Coil circuit for looseness.
> >> Then check the distributor advance plate for the tiny
> >> braided pigtail lead. If broken, the pigtail won't
> >> provide proper grounding as the advance plate rotates.

>
> >> Speedy Jimhttp://www.nls.net/mp/volks/

>
> > Thanks so much! I'll check those items tomorrow. The mosquitos were
> > too fierce this evening.
> > David- Hide quoted text -

>
> - Show quoted text -


Thanks also. This group is great and the ongoing education of owning
a beetle continues for me.

  #6  
Old August 29th 07, 07:50 PM posted to rec.autos.makers.vw.aircooled
Berg
external usenet poster
 
Posts: 175
Default Electronic ignition dizzy question

wrote:
> On Aug 29, 6:03?am, "John" > wrote:
>> When semiconductors fail (particularly in a stressed circuit like ignitions)
>> they do so catastrophically
>> and either go completely short circuit or open circuit. There is no half
>> way. Obviously the output
>> transistor is working as you noticed the lamp come on at 7.5. The circuitry
>> does take a little current
>> to work so its almost certainly as the Speedy suggests.
>> > wrote in message
>>
>> ups.com...
>>
>>
>>
>>> On Aug 28, 4:30?pm, Speedy Jim > wrote:
>>>> wrote:
>>>>> I am looking at a '70 beetle. It has a vacuum advance dizzy with
>>>>> electronic ignition which I am not familiar with instead of points and
>>>>> condensor. I can't tell the make. While checking the advance with
>>>>> the homemade Muir lamp I noticed it stayed lit dimly all the way
>>>>> around the clock until it got to about 7.5 and then lit up fully. Is
>>>>> this normal for electric ignitions?
>>>>> The engine takes takes about 6 seconds to catch although all the tune
>>>>> up settings are good. It idles fine but has an intermittent miss at
>>>>> speed.
>>>>> David
>>>> That's probably normal leakage thru the electronics.
>>>> The long cranking may have nothing to do with the spark;
>>>> more likely slight flooding.
>>>> If the miss occurs at odd times under load, inspect every
>>>> push-on terminal in the Coil circuit for looseness.
>>>> Then check the distributor advance plate for the tiny
>>>> braided pigtail lead. If broken, the pigtail won't
>>>> provide proper grounding as the advance plate rotates.
>>>> Speedy Jimhttp://www.nls.net/mp/volks/
>>> Thanks so much! I'll check those items tomorrow. The mosquitos were
>>> too fierce this evening.
>>> David- Hide quoted text -

>> - Show quoted text -

>
> Thanks also. This group is great and the ongoing education of owning
> a beetle continues for me.
>


Buy a CDI unit, hook it up to the points replacement module and your
stock coil, and voila! Starts within one full rotation, that is my
experience anyway.

J.
 




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