442 Project: Looks can be deceiving

rogue_ryder

rogue_ryder

Greasemonkey
Oct 27, 2017
135
63
Colorado
I got my run on issue solved! I isolated the problem to the alternator. No new alternator needed, or fancy fan controller (although after some research I will set up PWM for the fans so the electrical system won’t be so stressed), just a cheap diode! $8 for a plug and play harness is all it took. If Radio Shack sold these like they did when I was a kid It would’ve been fixed for pennies.
EEB31B50-6EF4-4714-A963-34A164EA5816.jpeg

I’m really not sure why Holley doesn’t include any info in their directions about old cars needing a diode so their ignition system will work properly and by properly I mean turn off when the key is in the off position. Apparently some of the MSD 6 ignitions even include a diode! And their instructions talk about the issue I had. I’m thinking I might contact Holleys customer service and let them know and maybe they can update their instructions; which are VERY good otherwise.
 
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