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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