Q: The car won't start unless it sits for over four hours

In the last several months, my car has been having troubles starting up. But, it happens in particular situations. If I start up the car after it sat for four hours or more, everything's fine. However, if I start it after it sat for a shorter period of time, say an hour and a half, or 40 minutes, then it cannot be started. When it happens, I have to let it cool down for several hours more in order to get it running again. I've been to the mechanic's and I had so many things done, including the battery replacement, cleaning the wires, replacing the fuel pump, checking for any electrical issues, checking the parts under the hood, filling in fuel. The issue remained the same. The dash shows no lights on either. Any ideas?