Put a new oem replacement fuel pump in the car 2 weeks ago. Went in a parade for the town I live in last night afterwards turned the car off for a bit, went to start it back up and it sputtered then died and wouldn't restart. Checked the pressure at the rail and it says 20 psi give or take. What are the odds its the pump? Or could it just be a bad filter since I have fuel pressure just not enough. My car has 61k miles is an 85 is bone stock and never raced. Any thoughts would be great. Thank you.