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Old 04-09-2021, 01:05 PM   #1
itlksez
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Default Ballast Resistor?

1987 740, B230f, LH-Jetronic 2.2

Quick question: I swapped this engine into an old Jeep. I had an issue with power to the coil during the swap, so I ran 12v directly to the coil (through a diode so I could shut it off) from the ignition switch. If Iím bypassing wherever the coil power came from before, do I need an external ballast resistor in this power source? Two different coils for the same application on rockauto; one says it needs external resistor, one says not required.

I just donít want to fry anything by not running one if the prior setup had one built in.

Thanks!
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Old 04-09-2021, 02:20 PM   #2
dl242gt
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That setup should be using the 124 ignition amp with a 117EZK box. No, that setup doesn't use a ballast resistor if you are using the stock coil.
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Old 04-09-2021, 02:50 PM   #3
itlksez
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Awesome. Thank you so much.
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