HEI Ignition coils
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
Last edited by wilcar; May 19, 2021 at 12:06 PM.
Le Mans Master
Joined: Apr 2001
Posts: 5,941
Likes: 281
From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Read this and use a multimeter to test some things. If you have a problem it should show up.
https://www.chevyhardcore.com/news/h...-distributors/
https://www.chevyhardcore.com/news/h...-distributors/
Drifting
Joined: Aug 2019
Posts: 1,336
Likes: 225
Coil specs are .5 ohms (thats 1/2 ohm)on the primary, and about 9k to 11k ohms on the secondary. The ohms test will only tell you if a part is bad. If a coil has arcing in the secondary, it will pass the test, but it will act up when hot. Buy a name brand module. Standard, Borg Warner, Napa, Delco are the names that I would recommend. One other thing, the color of the coil lead should match the pick up coil leads. So if the pick up has a white lead, then the coil must have a red and white lead. If the pick up has a yellow lead, then the coil must have red and yellow leads.
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
over the years HEI has had me scratching my head more than once.
bad ICMs
bad coil
bad reluctor wheel pickup.
and of course heat was the culprit that made it hard to pinpoint.
When hot the device would be flaky.
Trouble is proper testing when hot,
anywho, the reluctor change was the hardest.
bad ICMs
bad coil
bad reluctor wheel pickup.
and of course heat was the culprit that made it hard to pinpoint.
When hot the device would be flaky.
Trouble is proper testing when hot,
anywho, the reluctor change was the hardest.
