Pinkiedog,

I had basically the same problem last summer. You can see in old posts it took months to find....and was a connector defective inside itself. I ran all new wiring for that circuit from the ignition switch out. It is not hard to do if you disconnect your battery, undo the ign switch bezel, pull the key part out of the plastic plug on its back, pull out the tang connector in the appropriate socket hole, put your new wire onto a new tang connector, and slide it back in the hole, then put the switch back on the socket. Then is a really good time to think out if you want a few more "hot when running" wires for other gauges or lights. Just put a few in the tang connector at same time znd seal their ends with heat shrink til you need one. You are only talking three or 4 wires here, and the redoing lets you rout them where you want them, like on fender instead of on engine, etc. Just draw before and after pics. Oh, it helps to have a really good ground. I ran a battery cable from block to firewall and used a stainless bolt and copper washer for attachment.

rock
'64d100

Next time it dies, leave the ignition on, get a screwdriver, pull a sparkplug wire, and check for spark. If you have none, then that whittles down possible issues.

Ballast resistor - The ceramic wrap the coils go around can get so hot they become very brittle (more so than ceramic usually is) and most of our cars don't ride all that great anyways, so the ceramic in the resistor may have broken the coil, and under heat, it pulls away.

HEI module (Even though it may not feel very hot, if it has a bad solder joint, they can warm up and dislodge just enough to lose connection)

Coil - They get hot and short out...

Dizzy Pickup - I can't say I've ever seen the pickup in the dizzy have an issue with heat, the only thing I can think of is expansion from the heat causes the air gap to decrease, and thus, causing it to stop sending the correct signals to the HEI module.

Where the others are pointing with the wires is also a very good place to look. If you can, take a multimeter with you and when it dies, check for power in all the right places. I've seen alot of wires that have great conductivity until they become hot, and then they seperate, causing the wire to only carry part of the amperage required to run the equipment.

Fusible links are notorious for that... amongst other things...


~THOR~

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1984 D100 Shorty Custom
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