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Unread 03-04-2013, 02:20 PM   #16
86cj74.2L
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Any can type coil with the ford terminals will work.

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Unread 03-04-2013, 10:47 PM   #17
bigbird24
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3.0 OHM or 1.5 OHM doesn't make a difference?
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Unread 03-04-2013, 11:12 PM   #18
BagusJeep
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The coil is a standard 12V BALLASTED coil. It normally runs at 7V and in Start it gets 12V for a few seconds.

Lots of vendors selling coils with all sorts of fantastic claims but it is a bog standard sub $20 piece of kit.

I have a Mallory Promaster coil ($96) that will take a lot of punishment but in reality any new coil will work better than that old one.

And that thing on the side is to reduce radio interference, not vital but useful.
schematic-ignition-layout.png  
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1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
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Unread 03-05-2013, 04:27 AM   #19
John Strenk
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Quote:
Originally Posted by bigbird24 View Post
3.0 OHM or 1.5 OHM doesn't make a difference?

Kind of, the coil winding in the higher performance coils usually have a lower resistance so using a 3 ohm ballast resister might drop the voltage too low on the coil. the 1.5 ohm will raise the voltage but allow more current to run through it and could overheat the ICM.


The resistance wire in a stock jeep is 1.35 ohms.
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Unread 03-05-2013, 04:03 PM   #20
bigbird24
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The new wiring harness and weber carburetor have made the icm useless so it has been removed. which still leaves me with the question of which to use, sorry but I'm new to this
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Unread 03-05-2013, 04:43 PM   #21
86cj74.2L
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If your just looking to replace the coil with a OEM coil just go to the parts store and get a new coil for a 80's CJ with a 258.

Is yours bad or you do not like the rust?
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ignition coil , ignition module

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