Why is My 1992 Jaguar Majestic, loosing speed to about 10mph, and shutting off

What is your question?

I had a fuel pump put in professionally, and the car is getting fuel. I can hear the pump. I know the mechanic did not change my filter. Is this a problem? Could massive air intake be causing this problem. Thanks for your help. My majestic will run for about 10 minutes, and loose power and cut off.