my buddy just picked up a 93 prelude today and has msd wires, external coil, etc.. to put on it. he told me today that it already has an external coil stock. (i know nothin about preludes) he said he ran into a problem with the install, the stock one has 3 wires goin into it, and the msd has only 2. whats this extra wire and what to do with it?

 

Just got to MSD website for wiring instructions. If its the blaster SS coil its a fairly simple install