Why do I have a problem starting the car, especially when it's been running

What is your question?

I replaced the alternator, the battery, the Thermasta /sensor, the coolant sensor and the waterpump sensor. I also replaced the pulles, along with the dual filters. When I put everything back on it started like a champ and ran good. Soon after, it started having problems starting. It always starts just takes two times for it to turnover