I have a 2003 GP with a 3100 sfi and am having a start problem.
I have replaced the fuel filter.
I ran a pressure test (while running ) was 50 psi.
When I turn the car off it leaks down.

I was told it could be a fuel pressure regulator ?

When I turn the key on I can hear the fuel pump building pressure..

It only does this now and then but starting to be more frequent ..

Thank you for any help.