why will my car not start acura tl 2005

What is your question?

When i start my car it sometimes dies soon as it start seconds later it stalls out. . If it stays on it tends to die out and stall while in motion no matter speed i might be doing . I just changed fuel pump hoping it fix the problem but it didn't.. !! Wgats wrong or what should I do to eliminate the problem . Pls help

What makes this problem better or worse?

switching on nd off in switch tends to start it up for what it lastes

How long has your 2005 Acura TL had this problem?

over 5 weeks