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08-26-2012, 04:59 PM
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#1 |
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Registered User
Join Date: Mar 2011
Location: fort dodge,Iowa
Posts: 65
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HEI coil
Is there a reason that the coil goes bad in the HEI dist.? Was getting no spark at the no. 1 plug, so I changed out the coil on the HEI and she fired right off. Ran it a few miles last week(ran crappy but it ran), sat all week, went to start it and it hit once, and now no spark again. Rebuilt 283 with HEI from Summit. Ideas?
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08-26-2012, 05:26 PM
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#2 |
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Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: HEI coil
When you hooked up your HEI did you run the pink wire to the dizzy, it should be direct from your ignition switch.
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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08-26-2012, 07:04 PM
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#3 |
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Registered User
Join Date: Mar 2011
Location: fort dodge,Iowa
Posts: 65
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Re: HEI coil
will double check
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08-26-2012, 07:17 PM
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#4 |
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Account Suspended
Join Date: Mar 2011
Location: Yerington, Nevada
Posts: 864
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Re: HEI coil
Because they are an epoxy filled coil, and subject to radical and severe overheating, which usually also takes the HEI module out as well. carbon brush might be bad as well, not installed correctly.
Epoxy is a heat barrier, NOT a transfer medium, as oil is. Carb heat spacer plates are made frm epoxy. Best you can to for a coil in cap HEI is to use one of the kits to move the coil OFF that cap, and use an oil filled round coil. . |
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08-26-2012, 07:37 PM
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#5 |
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Registered User
Join Date: Mar 2011
Location: fort dodge,Iowa
Posts: 65
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Re: HEI coil
The wire from the switch runs to the coil via fuse panel, fuse is good. does it matter which terminal this wire is on? is on the back or right post as you are looking at disty from drivers side.
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08-27-2012, 12:24 PM
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#6 |
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Account Suspended
Join Date: Mar 2011
Location: Yerington, Nevada
Posts: 864
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Re: HEI coil
That path is OK, as long as that terminal is marked either IGN or IGNITION, and is full 12 volts hot in both switch positions start and run.
I have a few thousand small body HEI conversions running coil power just that way, with absolutely NO problems. |
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08-27-2012, 06:34 PM
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#7 |
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Registered User
Join Date: Mar 2011
Location: fort dodge,Iowa
Posts: 65
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Re: HEI coil
Thanks for your help! Looks like my next move is to move the coil out of the cap.
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08-27-2012, 07:01 PM
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#8 |
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"Where were you in '62?"
 
Join Date: Jul 2004
Location: Cleveland County, North Cackalacky
Posts: 5,013
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Re: HEI coil
Pertronix Flame-Thrower HEI Distributors
 http://www.pertronix.com/prod/ig/flame/dist/hei.aspx  http://www.jegs.com/p/Pertronix/Pert...49237/10002/-1
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08-27-2012, 10:59 PM
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#9 |
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Account Suspended
Join Date: Mar 2011
Location: Yerington, Nevada
Posts: 864
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Re: HEI coil
Yup, there is one of those that needs the coil to come out of the cap, but then, that one is also made in China. I have fixed tons of them, my educated opinion about them is, they are just not worth the effort.
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08-27-2012, 11:19 PM
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#10 |
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Registered User
Join Date: Dec 2011
Location: chico california
Posts: 68
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Re: HEI coil
yea make sure you have a 12 gauge wire from the fuse box under IGN UNFUSED. run it into the BAT side on the HEI distrib, and check the module,
just some advise haha |
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08-28-2012, 09:54 AM
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#11 |
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Account Suspended
Join Date: Mar 2011
Location: Yerington, Nevada
Posts: 864
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Re: HEI coil
One thing to remember, the old resistance tests for module, coil are no longer accurate.
There are auto part stores that now have off vehicle testers, and they should be used to test components. These testers run test the parts, not resistance test them. One thing to do is NOT let the attendant just do a 5 second test and get a "yup, it works" answer, let the part run on the machine for a while, get it to operating temp, and look closely. The reason those n cap disasters need a 12 gauge wire is, the coils are just that bad. The epoxy coils are just current hogs, and only make heat from that current, quite adverse. My remote coil, small body HEI conversions use a 14 gauge wire for both coil and module, with NO adverse effects, because the coil runs physically cooler, and that saves electrical components. |
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