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<p>Guy,</p>
<p>I run HS6s on my TR4. They came off a 67 4A. I have zero trouble
with them. Car idles fine and throttle response is similar to my
3, which has H6s and my 6 which has the Hitachi HS6 carbs. I think
you may have a vacuum leak somewhere, manifold most likely or
maybe a problem with the float valve? What fuel pump do you use? I
have the Facet model on all 3 running about 2PSI at the regulator.</p>
<p>But even with the mixture nut all the way up, there will still be
fuel to the throttle body that is if you have the needle installed
on the piston correctly.<br>
</p>
<p>Bob<br>
</p>
<div class="moz-cite-prefix">On 9/6/19 10:34 AM, G.D. Huggins wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5B708EC1-BB2D-4EFD-9169-C413AD8FF550@genfiniti.com">
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All,
<div class=""><br class="">
</div>
<div class="">Here’s another thing to ponder whilst I wait for my
rebuilt lever shocks to arrive..</div>
<div class=""><br class="">
</div>
<div class="">My engine will idle under the following conditions:</div>
<div class="">
<ul class="">
<li class="">Idle screws are backed off all the way, not
touching the plate, therefore not opening the throttle
plate. (In theory, they are fully closed.)</li>
<li class="">Mixtures nuts all the way lean. (In theory, there
should be ZERO fuel going into the carbs.)</li>
<li class="">Both the throttle and choke are loosened from the
linkage, making sure jets are all the way up, and throttles
are not sticking</li>
</ul>
</div>
<div class="">For the record, these are professionally rebuilt HS6
carbs, with super throttle shaft bushing, perfectly centered
jets, etc.</div>
<div class=""><br class="">
</div>
<div class="">In what is ostensibly a ZERO fuel/air mixture, how
is this engine running?</div>
<div class="">Do these engines just have a magic power to idle
when starved?</div>
<div class=""><br class="">
</div>
<div class="">Has anyone else witnessed this on their own cars?</div>
<div class="">If so, should I do anything? If so, what? (other
than maybe looking to make sure the needles/jets are matched
correctly)</div>
<br class="">
<br class="">
<div class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space;
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white-space: normal; word-spacing: 0px;
-webkit-text-stroke-width: 0px;">Kind Regards,<br class="">
<br class="">
Guy D. Huggins<br class="">
<a href="mailto:gdhuggins@genfiniti.com" class=""
moz-do-not-send="true">gdhuggins@genfiniti.com</a><br
class="">
817.454.6415</div>
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