FDS5 - Check Fuel Pressure With Engine Load

^ Fuel pressure test kit installed.

^ Disconnect vacuum hose at the fuel pressure regulator and plug it.

^ Observe fuel pressure while driving vehicle with heavy accelerations.

^ Does fuel pressure reading remain within +/- 3.0 psi during the test?

YES -- Unplug vacuum hose and connect it to fuel pressure regulator. Go to FDS6. FDS6 - Check Fuel Pressure Regulator

NO -- Go to FDS8. FDS8 - Check Fuel Filter