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Old 05-15-2011, 05:19 PM
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burning up ignition modules, how many volts to coil?

Hi,
I think I have just burned up my second ignition module on my Mallory Unilite distributor. I am also using a Mallory promaster coil (model #29440) but not an in line ballast resistor. Should I be?

The car ran, shut it down and 2 hours later no spark to the plugs again. Coil has 11.7 volts going to it wired off of the ignition switch.

Any help would be appreciated.

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Old 05-15-2011, 05:55 PM
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These units are very sensative to voltage spikes from a "loose" alternator. Mallory has a fix for it.
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Old 05-15-2011, 05:57 PM
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What is the fix? I've been reading some online blogs that say it is mandatory to run the ballast resistor (Mallory #MAL-700) or this will continue?

Thanks,
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Old 05-15-2011, 07:46 PM
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They sell a "spike guard" that fits in the ign wire to the resistor.

Years ago I got to spend a "my expense paid" weekend in St Ignas, Mi. Because a Delco alternator "spiked" my Unilite. No parts in available Upper Michigan.

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Old 05-15-2011, 07:47 PM
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You definitely need the ballast resistor with the Mallory coil.

Is the Unilite module connected to the coil ignition wiring?
Are you running solid core spark plug wires?
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Old 05-15-2011, 08:00 PM
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U running an ext or int regulator? Mine kept burning up modules untill I swapped the ext regulator for a internal Alt/regulator, been running good so far
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Old 05-15-2011, 08:47 PM
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Quote:
Originally Posted by Runnin'OnEmpty
You definitely need the ballast resistor with the Mallory coil.

Is the Unilite module connected to the coil ignition wiring?
Are you running solid core spark plug wires?

I will get a ballast resistor. Unilite is wired to the Mallory promaster coil via the 3 wire pigtail. Not sure on the wires? Will they say on them?
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Old 05-15-2011, 08:49 PM
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Quote:
Originally Posted by EOD Guy
U running an ext or int regulator? Mine kept burning up modules untill I swapped the ext regulator for a internal Alt/regulator, been running good so far

Exterior regulator. Thanks for the help.
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Old 05-16-2011, 02:17 AM
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The spike filter will also help with the External voltage regulator.

You can check Mallorys site or go to Summit's site & they have Pdf. intructions for wiring. Just look up a Mallory Coil or Distributor & you'll see the link.
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Old 05-16-2011, 04:08 AM
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Do'in the alt swap was possibly the best thing I have done for my car. It's super simple....... basicly jumping the existing wires coming off the external regulator and adding a wire from the radiator support splice/stud back across the radiator support to the external reg area.

The best thing is no more dim lights!
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