225 having some trouble firing up

Sully1190 said

Ah! I think I understand it all now.

So the distributor should be causing it to alternate between hot and ground, correct? Problem is, it doesn't alternate at all. It just stays full-hot when the engine is trying to crank. Unless I'm misunderstanding, which is entirely possible, because I don't profess to be the most inclined person in the world on these parts, that might mean that the distributor isn't turning to hit a point? Which would explain why we're not getting a spark from the plug wires?

Or, would the problem more likely lie in this ECU?

Click to expand...

the way an ignition coil works is rather simple when you have a basic understanding of electricity: when electricity flows it causes a magnetic field, this field can be imparted to another wire in close proximity causing electricity. the coil is actualy TWO coils, the primary that the ignition is hooked to, and the secondary that fires the plugs. when the primary is grounded (thru the ECU or points) current can flow, creating current in the secondary and firing the plugs.
it seems to me that your coil fried and it needs replaced, perhaps the balast went bad and they just ran a hotwire to the coil because they didnt know about the balast resistor or didnt have one. replace both the balast and the coil. if that dosnt solve the problem try a new ECU.
use the diagram that 73AbodEE gave you and make sure all the wireing is good. make sure you have batt + voltage at the balast reststor on one side only.