NO START

1989 Mazda MPV 4cyl 2w/d. My car quit while driving. It quit as though it ran out of fuel. I had it towed home. It sat for 2 hrs. I tried to restart, it started, but only ran for 1 or 2 seconds. No restart. Replaced fuel filter. Started briefly. No restart. Checked fuel pressure, it's fine. Checked for spark, got blue spark. Sprayed small ammount of starting fluid into cylinders. Fired briefly till fluid burnt off. Checked for spark again the next day. No spark. Tested coil with ohmmeter, failed primary resistance test. Replaced coil. No start & no spark. Had vehicle towed to repair shop. He got it running using my origional coil & told me the new coil was no good. Parts store tested it and said it was good. Anyway it ran for 2 days quit again and now Im back where I started. So far have replaced coil twice, new fuel pump, cap, rotor, and the pickup coil has been tested & passed. It ran great for those 2 days.