Thanks for the open offer to share,
I just thought I'd share a very similar experience. It may not have
anything to do with you situation, but it was definitely something I
never would have thought of. I was lucky enough to have this guy
that I bought a bench seat off of to share his knowledge. Like
yourself I had exhausted what I thought was all possibilities. Right
after the second carb rebuild (no clogged ports or jets) I ran gas
straight out of a clean jar because I thought that dirty gas from
the old tank was clogging the jets. But I had the same problem.
Mario said that the old spec for the size of the jet doesn't work
well with the combination of new gas (compared to the 70's gas)
dirty tanks and the Texas environment. I'm not a chemist or an
atmospheric pressure specialist, so I got no clue if this is truth
or myth. I just know he was right on the money. I wish I could
remember what we drilled it out to, it wasn't much, and this hole is
already very small to begin with. I might still have it written down
somewhere, I'll take a look. Seems like I remember he said that the
pilot jet from the Pict 30 was also a slightly larger bore than the
34's and would work in the 34, but I wouldn't swear to it (again bad
memory, and it's only been two years;-). The pilot jet that I'm
referring to is shown as #34 on the exploded view in the Bentley
manual fig 5-27. The one on the right side of the carb as you're
looking at it from the back of the engine.
So the mystery man Mario not only hooked me up with a bench seat,
but in less than two minutes he identified a problem I had been
scratching my head over for a couple of weeks.
I'll be continuing to eves drop if you don't mind. I don't have much
to share but I'll be happy to chime in if I think I've got something
that might be helpful. Take it for what it's worth, use it or ignore
it, as always it's up to you. Thanks for the warm welcome.
Good Luck,
Dave
P.S Don't worry, my back porch is a concrete slab so no worries of
me fallin off any time soon. Wait, I do have a dog I might trip
over.......
From: Mike Hayes <mike@xxxxxxxxxxxx>
To: tcb@xxxxxxxxxxxxx
Sent: Mon, September 20, 2010 5:45:35 AM
Subject: [tcb] Re: Why?
Ditto on the electronic ignition! I run it in all my cars.
David has a point with the idle jet. Although he drilled his out it
might have been clogged and drilling it out just unclogged it. I
had 2 brand new 34's pict carbs and they both did the same thing as
yours. Turns out both idle juts were clogged with manufacturing
trash.
Mike
On 9/19/2010 8:25 PM, Julie wrote:
> Why have a distributor with points? Why worry about a gap and
have to concern yourself with timing?
>
> I love my '71 and his electronic ignition and no points and timing
that stays right on and his simple 30/31 pict carb. That's all I can
handle.
>
> The '68 drove great on his first 3 short test drives but now he
won't idle. I looked for intake leaks and cleaned out jets,
adjusted his 34 pict carb and then switched to another 34 pict carb
and adjusted points and timing and after all of this no change,
still no idle, foot off gas and he dies. (I now know that I should
have started with the points and timing first but my excuse is that
I never had to deal with them before.) All of this fiddling around
and no change.
>
> Some friends are coming over next Saturday to help me because I
can't figure it out. I might just go buy myself another distributor
(one with no points) and I'm half tempted to get a 30/31 carb so it
will be easier for me to handle.
>
> Ok now this might be a ridiculous question but is there a
possibility that my idle problem could be connected to my bad
ignition. When I start the Bus the key does not come back to the
run position, I have to carefully move it out of the start postion.
I bought the stuff to fix the problem but it sounds like a tough job
and add to it that this Bus has crazy wiring so I haven't yet
mustered up the courage to try to fix it.
>
> (Everything on this engine is new except for the generator.)
>
> Thanks for any advice,
>
> Julie
>
>
>
>
>
