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Your idle is probably too high.<br>
<br>
Reduce the idle speed first and see if the problem goes away.<br>
<br>
If the speed is high enough to create some vacuum at the ported
port, the vacuum advance will pull in, advancing the timing and
causing a speed increase, which makes the ported vacuum pull even
greater, all the way advanced. Bliping the throttle reduces the
vacuum, temporarily returning the vacuum advance to minimum advance
timing, then it all starts over again.<br>
<br>
The idle should NOT change when the vacuum advance hose is removed,
because there should be no vacuum at this hose with the correct idle
speed. So, no vacuum, no extra air entering carb port.<br>
<br>
Yes, the stuck carb is because somewhere along the ownership chain
someone left off the washer under the nut. The pot metal squishes
under the nut and fills in around the threads of the stud. Pick at
where the gap between the stud and the carb top is with a metal
pick. Open up this gap and the carb will come off. Wiggle, jiggle,
and worry off the carb. You can make a hole saw looking tool to cut
this gap, but I've never had to use this on a carb. Usually this
tool is reserved for head studs rusted to heads.<br>
<br>
Frank DuVal<br>
<br>
<br>
<div class="moz-cite-prefix">On 9/18/2014 9:18 PM, daniel--- via
Novacc-list wrote:<br>
</div>
<blockquote
cite="mid:c94e04ed28eae11cb957282ee30f4530.squirrel@webmail04.register.com"
type="cite">
<p>Had some time after work today to tinker. If you recall, my
Corvair runs well when it's out on the road but idle is
ridiculously high.</p>
<p>I found that the idle drops to a normal level if I remove the
hose to the vacuum advance. This makes me wonder if the breaker
plate is moving
(i.e., advancing) at idle. Shouldn't idle *increase* with the
hose removed because a leak has been introduced into the system,
or am I just confused? Suggestions?</p>
<p>I feel like I'm so close to having a Corvair that runs exactly
as it should, but I can't seem to get over this
hump.</p>
<p>Also, I replaced the bakelite carb gaskets on three of my four
carburetors. Why only three? Because my right side secondary
appears to be fused to the longer stud -- I wish I was making
this up, bit it wouldn't lift off (I didn't try to force it).</p>
<p>Thanks in advance
(ha!),</p>
<p>daniel</p>
<br>
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