<div dir="ltr"><div class="gmail_default" style="font-size:small">I should have added this info at the start:  Stock 260, original carb, original points type ignition.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Things I've tried since my original message:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Tightened the nuts on the carb mounting studs, and the screws that hold the top on, nothing was loose</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">All the electrical connections seem tight, no corrosion.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Let the car warm up again, and it started doing it a little.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">The old carb cleaner trick:  I sprayed carb cleaner all over anything that might have a vacuum leak,carb base, hoses, and so on...  nothing happened</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">With the timing light connected, I watched the advance as a couple dips happened... no change, timing was right where I left it, and I could not detect any missing flashes during the dip.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">And, after a few minutes, it stopped doing it.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">So that's it for today.  Tomorrow is busy, Monday I'll take it for a drive and see if it's any different, or if any more clues appear.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 31, 2024 at 4:54 PM M Lafayette via Tigers <<a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>
<div style="font-family:arial,helvetica,sans-serif;font-size:14pt;color:rgb(0,0,0)"><span style="color:rgb(0,0,0);font-style:normal;font-weight:bold">I had the same symptoms years ago.  Leak in the vaccuum going to the PCV valve.  I'm betting that's the issue.  Or possibly a bad PCV valve, but I still think it's  a bad line going to the valve. <br></span></div>
<div style="font-family:arial,helvetica,sans-serif;font-size:14pt;color:rgb(0,0,0)"><span style="color:rgb(0,0,0);font-style:normal;font-weight:bold">Mark L</span></div>
<br>In a message dated 8/31/2024 3:49:03 PM Eastern Daylight Time, <a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a> writes:
<div> </div>
<div>
<blockquote style="padding-left:5px;margin-left:5px;border-left:2px solid blue">
<div id="m_8009456528955968275m_8685979321128247961yiv8325011580">
<div>
<div>
<p>I think a low float condition would not let it drive fine.</p>
<p> </p>
<p>Many conditions can contribute to idle surging so it starts with a process of elimination.</p>
<p> </p>
<p>Systems need to be checked – air, fuel and spark – loose wire connection, vacuum</p>
<p> </p>
<p>Ron Fraser</p>
<p> </p>
<p> </p>
<p> </p>
<div id="m_8009456528955968275m_8685979321128247961yiv8325011580yqt08769">
<p><strong>From:</strong> Rob Hogan <<a href="mailto:robertdhogan@gmail.com" target="_blank">robertdhogan@gmail.com</a>> <br clear="none"><strong>Sent:</strong> Saturday, August 31, 2024 3:18 PM<br clear="none"><strong>To:</strong> Ron Fraser <<a href="mailto:rfraser@bluefrog.com" target="_blank">rfraser@bluefrog.com</a>><br clear="none"><strong>Cc:</strong> Stu <<a href="mailto:sabre2tgr@gmail.com" target="_blank">sabre2tgr@gmail.com</a>>; Tiger Net <<a href="mailto:Tigers@autox.team.net" target="_blank">Tigers@autox.team.net</a>><br clear="none"><strong>Subject:</strong> Re: [Tigers] The latest problem: Surging</p>
<p> </p>
<div>
<div>
<p><span style="font-size:12pt;font-family:sans-serif">Isn't idle surging typically from a carburetor low float setting?</span></p>
</div>
</div>
<p> </p>
<div>
<div>
<p>On Sat, Aug 31, 2024 at 11:45 AM Ron Fraser <<a href="mailto:rfraser@bluefrog.com" rel="nofollow noopener noreferrer" shape="rect" target="_blank">rfraser@bluefrog.com</a>> wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<p>Stu</p>
<p> </p>
<p>Always difficult to troubleshoot remotely.</p>
<p> </p>
<p>You may have to do standard checks on all systems – air, fuel and spark</p>
<p>Alcohol in the fuel can tear up hoses and gaskets</p>
<p>Check to make sure fuel filter is OK</p>
<p>Check for vacuum leaks</p>
<p> </p>
<p>My 1^st thought – the fuel level is high</p>
<p>Check the float level and check for any debris in the float bowl</p>
<p> </p>
<p>Remove the air filter and idle engine to see if it is an air flow problem.</p>
<p> </p>
<p>Hope this helps</p>
<p>Ron Fraser</p>
<p> </p>
<p> </p>
<p><strong>From:</strong> Tigers <<a href="mailto:tigers-bounces@autox.team.net" rel="nofollow noopener noreferrer" shape="rect" target="_blank">tigers-bounces@autox.team.net</a>> <strong>On Behalf Of </strong>Stu<br clear="none"><strong>Sent:</strong> Saturday, August 31, 2024 9:57 AM<br clear="none"><strong>To:</strong> Tiger Net <<a href="mailto:Tigers@autox.team.net" rel="nofollow noopener noreferrer" shape="rect" target="_blank">Tigers@autox.team.net</a>><br clear="none"><strong>Subject:</strong> [Tigers] The latest problem: Surging</p>
<p> </p>
<div>
<div>
<div>
<p><span style="font-size:12pt">Ok, so I got the vacuum advance sorted and reset the timing, etc.  But now there's another issue.</span></p>
</div>
<div>
<p><span style="font-size:12pt"> </span></p>
</div>
<div>
<p><span style="font-size:12pt">The car starts and warms up normally, choke opening, temperature gauge coming up to the thermostat temp, etc. But then it starts surging at idle.  Accelerating, driving both seem fine.  But when it goes back to idle, waiting at a stoplight or something, it starts having these little dips, which soon become larger dips, to the point where it stops.  It restarts right away, then does it again.  At a stoplight I have to left foot brake so that I can keep my foot on the throttle to keep it alive.   </span></p>
</div>
<div>
<p><span style="font-size:12pt"> </span></p>
</div>
<div>
<p><span style="font-size:12pt">Here's a video I shot in the garage as it started to do it after warming up.  Anybody seen this before or... cured it?</span></p>
</div>
<div>
<p><span style="font-size:12pt"> </span></p>
</div>
<div>
<p><a href="https://www.dropbox.com/scl/fo/0613ys0iegdndjhnjt5a8/AIcza8ouXqEsp57qLWSlZOY?rlkey=s9h2q3sal042y9z3t5oav2uwt&dl=0" rel="nofollow noopener noreferrer" shape="rect" target="_blank">https://www.dropbox.com/scl/fo/0613ys0iegdndjhnjt5a8/AIcza8ouXqEsp57qLWSlZOY?rlkey=s9h2q3sal042y9z3t5oav2uwt&dl=0</a></p>
</div>
</div>
</div>
</div>
</div>
<p style="margin-bottom:12pt">_______________________________________________<br clear="none"><br clear="none"><a href="mailto:tigers@autox.team.net" rel="nofollow noopener noreferrer" shape="rect" target="_blank">tigers@autox.team.net</a><br clear="none"><br clear="none">Donate: <a href="http://www.team.net/donate.html" rel="nofollow noopener noreferrer" shape="rect" target="_blank">http://www.team.net/donate.html</a><br clear="none">Archive: <a href="http://www.team.net/pipermail/tigers" rel="nofollow noopener noreferrer" shape="rect" target="_blank">http://www.team.net/pipermail/tigers</a> <a href="http://autox.team.net/archive" rel="nofollow noopener noreferrer" shape="rect" target="_blank">http://autox.team.net/archive</a><br clear="none"><br clear="none">Unsubscribe: <a href="http://autox.team.net/mailman/options/tigers/robertdhogan@gmail.com" rel="nofollow noopener noreferrer" shape="rect" target="_blank">http://autox.team.net/mailman/options/tigers/robertdhogan@gmail.com</a><br clear="none"><br clear="none"></p>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
<div id="m_8009456528955968275m_8685979321128247961yqt66139">_______________________________________________<br clear="none"><br clear="none"><a href="mailto:tigers@autox.team.net" shape="rect" target="_blank">tigers@autox.team.net</a><br clear="none"><br clear="none">Donate: <a href="http://www.team.net/donate.html" rel="noopener" shape="rect" target="_blank">http://www.team.net/donate.html</a><br clear="none">Archive: <a href="http://www.team.net/pipermail/tigers" rel="noopener" shape="rect" target="_blank">http://www.team.net/pipermail/tigers</a> <a href="http://autox.team.net/archive" rel="noopener" shape="rect" target="_blank">http://autox.team.net/archive</a><br clear="none"><br clear="none">Unsubscribe: <a href="http://autox.team.net/mailman/options/tigers/coolvt@aol.com" rel="noopener" shape="rect" target="_blank">http://autox.team.net/mailman/options/tigers/coolvt@aol.com</a><br clear="none"><br clear="none"><br clear="none"></div>
</blockquote>
</div>
</div>_______________________________________________<br>
<br>
<a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a><br>
<br>
Donate: <a href="http://www.team.net/donate.html" rel="noreferrer" target="_blank">http://www.team.net/donate.html</a><br>
Archive: <a href="http://www.team.net/pipermail/tigers" rel="noreferrer" target="_blank">http://www.team.net/pipermail/tigers</a> <a href="http://autox.team.net/archive" rel="noreferrer" target="_blank">http://autox.team.net/archive</a><br>
<br>
Unsubscribe: <a href="http://autox.team.net/mailman/options/tigers/sabre2tgr@gmail.com" rel="noreferrer" target="_blank">http://autox.team.net/mailman/options/tigers/sabre2tgr@gmail.com</a><br>
<br>
<br>
</blockquote></div>