<div dir="auto"><div>It sounds like you are/have ruled out fuel starvation, indicating it has fuel as far as the carburetor (and presumably the cylinders), and you appear to be describing a sudden 'cut off' as opposed to the less sudden dieing out do to temporary lack of fuel. Yes?</div><div dir="auto"><br></div><div dir="auto">If so, it seems like it would need to be a fault in the ignition system that allows spark, then changes state to deny spark, then returns to the prior or similar state where spark gets called for, produced and delivered.</div><div><br></div><div data-smartmail="gmail_signature">________________<br>Sent from my phone <br>Best Regards,<br>Al Fuller</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, May 19, 2026, 10:52 PM john niolon <<a href="mailto:jniolon@att.net">jniolon@att.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div><font face="Segoe UI">Hey Moose, thanks for the reply. Harness was done by a pro that does it for a living...He is meticulous. He completely strips everything</font></div>
<div><font face="Segoe UI">from the car then starts from a blank slate... Everything new.. Nice looms and grommets at every hole and hides as much of it as he can.</font></div>
<div><font face="Segoe UI"></font> </div>
<div><font face="Segoe UI">Every component was new and oem or better... no import crap. I'm of the same opinion as you afa a short to ground but it's gotta be hidden inside something</font></div>
<div><font face="Segoe UI">that we can't see.</font></div>
<div><font face="Segoe UI"></font> </div>
<div><font face="Segoe UI">Someone on my ford forum suggested putting a volt meter in the circuit and watch the voltage for a drop...but you're so busy trying to get out of traffic and not</font></div>
<div><font face="Segoe UI">get plowed it's difficult to remember to watch the meter.... and yes this has been going on for over a year...intermittently and even after all the changes... it persists</font></div>
<div><font face="Segoe UI"></font> </div>
<div><font face="Segoe UI">john</font></div>
<div> </div>
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<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';COLOR:#000000"><b>----- Original Message -----</b></div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';COLOR:#000000"><b>From:</b> <<a href="mailto:eric@megageek.com" target="_blank" rel="noreferrer">eric@megageek.com</a>></div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';COLOR:#000000"><b>To:</b> shop-talk <<a href="mailto:shop-talk@autox.team.net" target="_blank" rel="noreferrer">shop-talk@autox.team.net</a>></div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';COLOR:#000000"><b>Cc:</b> john niolon <<a href="mailto:jniolon@att.net" target="_blank" rel="noreferrer">jniolon@att.net</a>></div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';COLOR:#000000"><b>Sent:</b> 05/19/2026 4:40:59 PM</div>
<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';COLOR:#000000"><b>Subject:</b> Re: [Shop-talk] strange automotive electrical problem</div>
<hr style="BORDER-TOP:medium none;HEIGHT:1px;BORDER-RIGHT:medium none;BORDER-BOTTOM:medium none;COLOR:#ccc;BORDER-LEFT:medium none;BACKGROUND-COLOR:#ccc">
<div style="FONT-SIZE:12pt;FONT-FAMILY:'Segoe UI';FONT-WEIGHT:normal;COLOR:#000000;FONT-STYLE:normal"><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">John, I would have bet money it was a hidden wire short somewhere. It had all the Hallmarks. But you stated the wiring harness what completely replaced. So, that rules that out...</span> <br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">Or does it?</span> <br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">My question, when you said 'headlight to taillight', that is complete. BUT was there ANY wire that was in that car that wasn't part of the harness?</span> <br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">Something in dash, neutral switch, tranny indicator, or some other component?</span> <br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">I'm still betting on a wire short, but I guess it could be a short inside a component. Maybe inside the alt or other part?</span> <br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">BTW, I'm assuming it was doing this, before you did all these mods, right? </span><br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">Anyway, that is a stumper.</span> <br><br><span style="FONT-SIZE:10pt;FONT-FAMILY:sans-serif">Moose</span> <br><br><br><br><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif;COLOR:#5f5f5f">From: </span><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif">"john niolon" <<a href="mailto:jniolon@att.net" target="_blank" rel="noreferrer">jniolon@att.net</a>></span> <br><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif;COLOR:#5f5f5f">To: </span><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif">"shop-talk" <<a href="mailto:shop-talk@autox.team.net" target="_blank" rel="noreferrer">shop-talk@autox.team.net</a>></span> <br><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif;COLOR:#5f5f5f">Date: </span><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif">05/19/2026 13:16</span> <br><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif;COLOR:#5f5f5f">Subject: </span><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif">[Shop-talk] strange automotive electrical problem</span> <br><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif;COLOR:#5f5f5f">Sent by: </span><span style="FONT-SIZE:9pt;FONT-FAMILY:sans-serif">"Shop-talk" <<a href="mailto:shop-talk-bounces@autox.team.net" target="_blank" rel="noreferrer">shop-talk-bounces@autox.team.net</a>></span> <br>
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<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Strange automotive electrical problem we need help with…</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">55 chevy automatic with 383 stroker motor, carbed, p/s,p/b,a/c</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Dakota digital dash system including neutral safety switch and</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Transmission gear indicator</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri"></span> </p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">When it is running right, it’s scary strong. Cruises nicely.</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri"></span> </p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Problem… when driving the engine dies like you cut it off…BUT will start back up</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Immediately and run perfectly till the next time it does it. Might be 15 minutes…15 days or</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">three month later. Might do it 4 times in a row or once and not repeat. Speed does not effect it. </span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Engine temp does not effect it… does it hot or cold. With the a/c on or off. It does not have a</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Cutoff switch in the system. Longest period with no failure is 7 months… shortest was 4 minutes.</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri"></span> </p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">When it stalls we checked fuel by looking in the bowl of carb and gas is spraying as it should</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">So we are assuming electrical of some sort. So far we’ve done the following…</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri"></span> </p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Replaced battery with new red top optima battery and all new battery cables (2 gauge I think)</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Replaced all ground cables frame/block… frame/chassis with 2/0 welding cable with new crimped</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">connectors and clean, bare metal attachment points</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">replaced ignition switch (twice… first with import then with oem switch)</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">replaced coil and distributor with MSD system with spark control box, separate coil and distributor…</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">it was taken from running vehicle. It's doing the same thing as the original ignition system.</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Replaced complete wiring harness…headlight to taillight with new Autowire harness…including all</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Switches and relays. Professionally done.</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Everything else electrical works without a glitch… we are at the wall here…</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri"></span> </p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">Ideas, suggestions, calculated wild a** guesses welcomed… </span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">thanks</span></p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt"></span> </p>
<p style="MARGIN-BOTTOM:0px;MARGIN-TOP:0px"><span style="FONT-SIZE:12pt;FONT-FAMILY:Calibri">john</span></p>
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