Engine not running?

Computer problem
1998 Ford Taurus 6 cyl Automatic 140000 miles

The check engine light is staying on and there have been problems starting the car. Sometimes the car will start and immediately stop as soon as the key is released. This normally happens when the car has just has been driven shortly before. After the car sits for a bit and cools down it will run normally for days afterwards and then do this again. Most recently the car wouldn't start at all even after sitting and cooling down. I could not hear the fuel pump kick on when turning the key. After letting it sit for a bit longer and wiggling the key in the ignition the fuel pump finally kicked on and the car started.