Mitsubishi Repair: NO SPARK (help im stumped), thin red line, coil wire

Question
I have no spark to the plugs. I have replaced plugs, cap, rotor and wires. Then a used distributor from a local wrecking yard. Still no spark. I then was told it needed a coil. still no spark. I did notice that when cranking the engine over there was a thin red line of spark from the coil wire from the coil when holding it aside of the engine. I then took a volt meter and verified there was 12 volts coming into the coil from the power wire. Positive 12 volts there. Also, I had taken the brain out of it and put it in another car that was same year and make as mine that a friend owned.  That car ran perfect. I think I can safely assume the brain is good beings it started and ran his car. So after checking all these things and still coming up empty handed, can you please help shed some light on this for me. What else should I be looking at? I do my own mechanical work, but this has been a real pain to figure out.Please help.

Answer
Richard: How about a bad sensor someplace? Those sensors feed the computer and it then does the work. But if one sensor is bad. It messes up the whole system. You need to have your car coded, AutoZone will do this for free. Or else get a voltmeter, a repair manual for your car, it will tell you what the codes are to be and start with the battery working your way through the whole car. Till you find the problem. It could be a short someplace too. Don't say what kind of car, model, miles or engine. But try that. Hope this helps and good luck!