No Start/Intermittent Start conditions are usually cause by either the fuel delivery system or no spark in the electrical system. I had both. Fuel delivery problem caused by faulty main relay. The relay was not functioning properly and not delivering power to the fuel pump. No spark condition caused by condensation inside the distributor b/c of faulty gasket. I did both up these repairs and it starts like a champ every time. I will post links to both of these repairs in a day or two. I am still tracking down the problem with the O2 sensor.