fuel filter..not fuel pressure reg.
Fuel pressure reg would either run rich or lean. Prob with
rich: Poor fuel economy, Hard start
lean: miss fire, back fire
a fuel filter clogged would cause no fuel to pass resulting in a stalling engine or cutting out. I have been starnded in the middle of nowhere in my Dodge Charger when I was 16 due to a plugged up fuel filter. I simple $10 part. Easy to change my passenger wheel underneath.