LSS dying and hard to start.....

I have a '96 LSS auto trans 3.8L nonSC with 100K. My car has randomly started stalling and hesitating to start ocassionally. Not a lot but seems to be getting worse.
I have recently changed the fuel filter about 2 weeks ago. TPS 1yr ago, intake 1yr ago, wires and plugs maybe 20,000 miles ago at most.

This has been happening for about a month.
Advice is much appreciated.

Thanks ahead of time!

Good fuel pressure? Check the hose to the press reg at the fuel rail, look for raw gas in the hose.

I did check the fuel pressure about a year ago and it was fine. I also about a year ago change the fuel regulator.
Should I check the fuel pressure again?

Why not, part of normal diagnostics.

Did you check the vac line to the fuel pressure regulator, as suggested?