FDS9 - Check Regulator For High Pressure Causes

^ Key Off.

^ Scan tool connected.

^ Remove return fuel line at fuel rail and connect short hose from rail to measured container of at least one quart capacity.

^ Key On, Engine Off.

^ Enter Output Test Mode to run the fuel pump.

^ Record fuel pressure and note whether fuel is being returned to measured container. Unground FP lead after 10 seconds or if container is more than half full.

^ Exit Output Test Mode to shut off the fuel pump.

^ Is fuel pressure between 240-280 kPa (35 and 40 psi) and is fuel returning to the container?

YES -- Go to FDS10. FDS10 - Check Fuel Return System

NO -- Replace fuel pressure regulator. Repeat Test Step FDS2 for verification. FDS2 - Fuel Pressure Test