Need help understanding Mopar ignition…no spark

That coil is a copy of the one that used to be used on HEI 6 cylinder chevy trucks
usully about $20 and perfect for the job

I run one works great.


do you have a tacho?
if so disconnect it and see if things improve

OR

do you have your coil wired in backwards swap the + and - connections over and see if things get better the + on that coil is the pair of spade connectors to the left of the lead that goes to the cap the negative is to the right. when the lead to the cap is closest to you.

you can't get this wrong in an origional install becasue the plug from the dizzy only goes on 1 way
when you wire it up with flying leads you can of course get it round the wrong way
having it the wrong way causes the spark to travel in the oposite direction across the plug gap......not optimal

+.......................................-
+.......................................-
....................* King lead to cap

The only other thing is having the pickup wired backwards
this causes rough running and varying advance, swapping this round involves reseting the timing bacause if its set to run nicely now it will be miles out when wires are swapped. the modue in most cases will run the car with this backwards, but just swapping the wires round doesn't necessarily result in a car that will start, you need to set the timing again.
balancer at 10BTDC rotor aligned with cap 1
close enough to start it. but then get the light on it and set it properly

last but not least i have had modules that just didn't work new out of the box...

if you have the hood up. check your earth strap from engine mount to chassis and chassie to battery.

motor won't run very well if it earths through radiator and throttle cable, the starter will labour and what the motor thinks is zero volts is not zero volts. if your module is earthed via its mounting bolt to a motor that isn't earthed to the chassis stuff just doesn't work proeprly

Dave