Various Topics on Jaguar

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I have a 1973 XJ6 with a broken AED unit. This means the car is
difficult to start from cold. My local mechanic insists that the AED is
a disaster guilty of many engine break-downs in the old days. So, to
rectify my problem he did not recommend the installation of a new AED
unit - although these are still available - but simply byp***ed the old
one with a valve that one has to open and shut manually: When starting
from cold, open valve; when engine is warmer, close valve so that the
carburettors constantly get the right amount of fuel. However, this
"fix" is far from perfect. The car is still difficult to start when cold
and the engine runs very roughly and unevenly until it is warm.

I am no expert on this so views are very welcome. Do you agree with my
mechanic that the AED unit is total **** that should be avoided at any
cost? Or should I rather install a new AED unit and hope for the best?

--
Øyvind Olsholt

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Øyvind Olsholt skrev:

> I have a 1973 XJ6 with a broken AED unit. This means the car is
> difficult to start from cold. My local mechanic insists that the AED is
> a disaster guilty of many engine break-downs in the old days. So, to
> rectify my problem he did not recommend the installation of a new AED
> unit - although these are still available - but simply byp***ed the old
> one with a valve that one has to open and shut manually: When starting
> from cold, open valve; when engine is warmer, close valve so that the
> carburettors constantly get the right amount of fuel. However, this
> "fix" is far from perfect. The car is still difficult to start when cold
> and the engine runs very roughly and unevenly until it is warm.
>
> I am no expert on this so views are very welcome. Do you agree with my
> mechanic that the AED unit is total **** that should be avoided at any
> cost? Or should I rather install a new AED unit and hope for the best?

No comments on this? Anybody who owns a Series 1 XJ here? If so, what
are your experiences with this choke system?

--
Øyvind Olsholt

..yn..

Øyvind Olsholt wrote:
> Øyvind Olsholt skrev:
>
>> I have a 1973 XJ6 with a broken AED unit. This means the car is
>> difficult to start from cold. My local mechanic insists that the AED
>> is a disaster guilty of many engine break-downs in the old days. So,
>> to rectify my problem he did not recommend the installation of a new
>> AED unit - although these are still available - but simply byp***ed
>> the old one with a valve that one has to open and shut manually: When
>> starting from cold, open valve; when engine is warmer, close valve so
>> that the carburettors constantly get the right amount of fuel.
>> However, this "fix" is far from perfect. The car is still difficult to
>> start when cold and the engine runs very roughly and unevenly until it
>> is warm.
>>
>> I am no expert on this so views are very welcome. Do you agree with my
>> mechanic that the AED unit is total **** that should be avoided at any
>> cost? Or should I rather install a new AED unit and hope for the best?
>
> No comments on this? Anybody who owns a Series 1 XJ here? If so, what
> are your experiences with this choke system?
>
Can't answer your question, but try doing a search here...
http://search.jag-lovers.org/search04/index.php

Choose "XJ(S1/2/3 + XJ12)" archive and "AED" as a Keyword, and c****
"Search";
c**** on the small white postage envelope (to the right of the "View
Entry" button")
in any interesting result to see the whole thread of postings for that hit.
For example, c****ing the envelope on the first entry yields this result...
http://forums.jag-lovers.org/av.php?1107099j44

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WayneC skrev:

> Can't answer your question, but try doing a search here...
> http://search.jag-lovers.org/search04/index.php
>
> Choose "XJ(S1/2/3 + XJ12)" archive and "AED" as a Keyword, and c****
> "Search";
> c**** on the small white postage envelope (to the right of the "View
> Entry" button")
> in any interesting result to see the whole thread of postings for that hit.
> For example, c****ing the envelope on the first entry yields this result...
> http://forums.jag-lovers.org/av.php?1107099j44

OK, thanks. Jag-lovers is a great resource. I can see here that many
owners have had trouble with their AED unit. One of the posters on the
Jag-lover's forum sums it up quite nicely when he says that the AED is
"an expensive item prone to overfueling engine if not in tip top
condition". And that's the answer to my question, I guess. So it's up to
me whether I choose to stay with the semi-manual solution, or buy an
expensive and less than reliable automatic enrichment device.

--
Øyvind Olsholt

..str..

AED my ***! What you are talking about is nothing more than an automatic
choke. Remember the choke? Your mechanic is doing nothing more than
suggesting you take out the electronically controlled automatic one and
replace it with a manual set-up. In theory he is correct and if he can
fashion one, he is a good mechanic. In real practice, you are better off
finding a new one and installing it. The problem with his suggestion is, if
you install a mechanical choke, the computer system won't be able to deal
with it and change all kind of settings (making them almost all wrong) and
that would open a whole new can of worms. Dammit!!!, why couldn't they just
leave things alone and rely on real mechanical knowledge and
engineering?????

--
"Impossible Madame, French justice today, doesn't make mistakes"

supposedly uttered by a
French fishmonger when told
that Alfred Dreyfus was
innocent
"Øyvind Olsholt" <niks_oyvindols@gmail.com> wrote in message
news:6c2pkoF3e46t0U1@mid.individual.net...
> WayneC skrev:
>
>> Can't answer your question, but try doing a search here...
>> http://search.jag-lovers.org/search04/index.php
>>
>> Choose "XJ(S1/2/3 + XJ12)" archive and "AED" as a Keyword, and c****
>> "Search";
>> c**** on the small white postage envelope (to the right of the "View
>> Entry" button")
>> in any interesting result to see the whole thread of postings for that
>> hit.
>> For example, c****ing the envelope on the first entry yields this
>> result...
>> http://forums.jag-lovers.org/av.php?1107099j44
>
> OK, thanks. Jag-lovers is a great resource. I can see here that many
> owners have had trouble with their AED unit. One of the posters on the
> Jag-lover's forum sums it up quite nicely when he says that the AED is "an
> expensive item prone to overfueling engine if not in tip top condition".
> And that's the answer to my question, I guess. So it's up to me whether I
> choose to stay with the semi-manual solution, or buy an expensive and less
> than reliable automatic enrichment device.
>
> --
> Øyvind Olsholt

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Kestrel skrev:

> AED my ***! What you are talking about is nothing more than an automatic
> choke. Remember the choke? Your mechanic is doing nothing more than
> suggesting you take out the electronically controlled automatic one and
> replace it with a manual set-up. In theory he is correct and if he can
> fashion one, he is a good mechanic. In real practice, you are better off
> finding a new one and installing it. The problem with his suggestion is, if
> you install a mechanical choke, the computer system won't be able to deal
> with it and change all kind of settings (making them almost all wrong) and
> that would open a whole new can of worms. Dammit!!!, why couldn't they just
> leave things alone and rely on real mechanical knowledge and
> engineering?????

Now, if you remember this is a 1973 XJ6 so there is no computer system
to bother about. But I'm inclined to buy a new AED anyway, as you
suggest, just to be able to start the damn thing from cold without
putting the engine through five minutes of rough idle and cylinders
coughing away! The car does start with the mechanical choke but this is
no real substitute for a working AED. With the AED the engine starts
just as easily from cold as from warm.

--
Øyvind Olsholt