It sounds more like the Ignition Control Modual (EZL) is faulty. Check the crank shaft position sensor to be sure, but I think that the previous owner knew it was the EZL. Being that it is such a costly part they sold the car verses fixing it.
Try ebay for a good used one if you need it. A couple hundered verses a couple thousand. Just make sure who ever you buy it from will guarantee it to be in workable condition.
Hope This Helps!