I wrote yesterday about my car dieing concerning the relays. I have a 78 280z california model (if it matters). I am trying to get it running good so that I can sell it. To try to clear up my last cry for help the problem seems to be stemming from under the box that is on the right side of the car. The engine will just die while driving, hot, cold, long trip, short trip, sometimes will go 1 day, 2days between kills, there is no certain condition. I went out and started yanking and banging and discovered that if I hit that box(relays under it) on the right side of the car I can make it die the same way as driving. A light tap will just make it fade a little and then recover. That is why I believe it is one of the relays under it but I don't know how to figure out which one. The car will always start right back up. Thank you.