Hey, is there anyone out there that could tell me how to wire a Subaru up (EA-81 w carb) old school? I put an EA-81 into an RX. I disconnected the ECU and put in a carb style fuel pump. But I am not getting any spark. I just want to know how to wire up the car so she will start???? Can anyone help me out out there???? I am literally about to pull my hair out.

I not exactly sure.but 12 volts to coil and choke should be enough.

coil 12 volts.with 2 wires from distribuor to coil also.

Points(very old school):

+ side coil should be hot in run and start only. - side of the coil goes to the dizzy, which will have one wire. When the points make contact, you get spark. These require regular adjustment and points replacement to stay running correctly, but are as simple as you can possibly get. The points can burn up if you leave the key in the "run" position for too long while the motor isn't running.

 

Breakerless/Electronic(better old school):

+ side coil is hot in run and start only. - side of the coil goes to the ignition module, which closes the circuit when it receives a pulse from the dizzy. The dizzy needs power in run and start to produce the pulse and where you get power from for the dizzy, depends on the system. The ignition module also needs a power source in run and start to operate. This system requires little to no maintenance other than usual cap/rotor/plug replacement. Electronic systems are also much better for performance and high voltage applications. Some, but not most, ignition modules can be damaged from leaving the key in the "run" position while the motor isn't running.

 

A google search can give you a diagram for both

 

If you have an electronic choke, it needs power in run only, if you want real old school your using a manual choke. If you want even older, old school, your dizzy isn't running a vacuum advance either, just a mechanical advance.

Just a note about the statement mentioned on the points. When the points come together current flows in the coil windings which charges up the field of the coil windings. When the contacts open current flow stops, the field suddenly collapses, and then the high voltage is generated by the field for the spark.