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 I?m 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 don?t want to fry anything by not running one if the prior setup had one built in.

Thanks!

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.

Awesome. Thank you so much.