318 Starting Problems, Help

67Dart273 said

Might be bad ballast resistor. Turn key to run, see if you have voltage at both ends of the resistor. If you have breaker point ignition and they are open, V will be "same as battery" on both ends. If the points are closed, you should have "same as battery" on one end, and something between 6-10 on the toher (coil) end

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3x vote for the ballast being most probable. But, because it could be the ignition switch too, you should follow the instructions above.

OP, if it is the ballast, then getting the right one is important; not just any old ballast resistor will work well in the Mopar system, which uses an unusually low ballast resistance. Higher ballast resistances will weaken spark energy considerably, and that will show up in cold starts, warm-up, and some other part-throttle situations as misses and stumbles.

Best selection in order of best, to just OK:
- Best: OEM PN 2095501 (0.5 to 0.6 ohms cold); look on eBay
- Better: MSD 0.8 ohm (cold) ballast resistor; get online or in some local auto parts stores
- Just OK: BWD RU19 which you can get in many auto parts stores