fuel pump noise 1994 Integra

I bought a new fuel pump for my 1994 Integra.
When the car gets HOT the car turns-over for 5-10 seconds before it
starts.
I replaced the fuel pump relay and the problem persists and now I get a
lound noise coming from my new fuel pump.
What's the problem?
Do you have to lower the gas tank to take out the fuel pump?
Please advise on what I should do and what I have to do yo replace the
fuel pump.
Thanks!
LEW