Ignition issues

[64Belvedere]

My 64 has had the electronic ignition conversion by someone in it's past. Now I am having trouble with the coil overheating. It has a balast resister but still boils the coil. I mean blistering hot to the point where a brand new MSD Blaster leaked it's oil into the valley pan. I'm on coil 3 and no closer to solving this. I haven't driven the car since I put the new coil in. It gets blistering hot just sitting with the key on. Any ideas?

 

[maddawg57]

Might be your ballast resistor. Your coil will get hotter when key is turned to start position because the voltage to the coil is stepped up then for hotter spark for startup. They also recommend that you mount your blaster 2 coil vertical .MSD list this resistor :https://www.msdignition.com/uploadedimages/MSDIgnitioncom/Products/Coils/8214_full.jpg

 

[maddawg57]

sorry link did not work correctly it is part# 8214 $8.60 it's an 0.08 ohm resistor

 

[rdrunner1974]

Coil wiring

Are you sure you are using the correct resistor? The 12 volt at the resistor should be a blue wire ( there may be 2 blue light and dark)
The wire on the other side of the resistor should go to the coil +. If there are 2 wires on the side that go to the coil, 1 is from the start relay which will give the coil full 12 volt for start. If the start relay is bad, you may have the full 12 volt to the coil all of the time. Check the voltage at the resistor to see if it is high.
Check the attached link for wiring diagram.
http://www.mymopar.com/downloads/Ignition_System_4pin.jpg

http://www.mymopar.com/downloads/elecignconv.pdf

e-mail me if you don't figure it out

 

[64Belvedere]

I dug through about 4 feet of snow to get into the shelter where the Belv is. I was looking at the Orange Box and Harness. The Box is a 4 pin and the Harness appears to be a 5 pin Harness. Who ever installed it just cut the green/Red wire off and taped it up. It has a 2 pin Balast Reistor. Where do I start????

 

[Coronet 500]

Green wire not used, Black wire to coil neg. coil pos. to ballast resister then to start circuit. Blue wire to other side of ballast resister then to run circuit. 2 wire plug to distributor. 4 of 5 wire plug are used.

 

[rdrunner1974]

coil

Use the 4 pin CCU diagram and 2 pin ballast diagram. The 5th wire will do nothing. Use a meter and check the coil voltage with the key in RUN. It should be less than 12 volt as you have a ballast resistor.
Check with MSD to see what resistance they recommend with the coil model you have.
I once had a situation where the voltage regulator was faulty and putting out too much which boiled the coil also. Check the voltage at the blue wire on your ballast, skould be 12-13.5 volt.