1999 Nissan Quest chugs and dies when hot

ShootingStarz's picture
1999 - 2002 Nissan Quest

Up until last week, my Quest did great. It started hesitating, chugging and losing acceleration. After that, it dies. It doesn't start, again, until it cools down.
My husband replaced the fuel pump and thought that was the problem. It did it, again, today. It didn't take as long to start this time, however. Before, it was taking about an hour or longer. It started up in 15 minutes while ago.
Any thoughts?