difference between fuel pressure regulator and sensor 98 mercury grand marquis

Asked by oldmanneedshelp May 04, 2018 at 02:13 PM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

RELAY OK, NEW FUEL PUMP WILL RUN FOR DAY AND THEN WILL START BUT RUN ROUGH THEN DIE BEEN TOLD REGULATOR OR SENSOR ARE THEY THE SAME THING

1 Answer
1,105

Jordan answered 5 years ago

They are two different things. A regulator regulates fuel pressure to stay within a certain range (usually 50-60 psi) and a sensor reads the fuel system pressure for the ECU to monitor and adapt to whatever fuel pressure the sensor is reading. Both a sensor and the regulator can have very similar symptoms, so I would try to do more research and troubleshooting before throwing parts at it.

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