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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-533 . TECHNICAL DESCRIPTION • The fuel tank may be under a slight pressure or vacuum depending on the state of the Evapora- • The ECM energizes the evaporative emission ventilation solenoid to shut off the evaporative • The evaporative emission purge solenoid is acti- vated to apply engine manifold vacuum to the • When the fuel system develops a vacuum of 2 kPa (0.29 psi), the evaporative emission purge • The ECM determines whether there is a leak or clog in the fuel system by measuring the change • The test is stopped when fuel vapor pressure is determined to be too high. . DESCRIPTIONS OF MONITOR METHODS • Depressurizing EVAP system by intake manifold negative pressure is impossible within specified . MONITOR EXECUTION • Once per driving cycle. . MONITOR EXECUTION CONDITIONS Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Not applicable Sensor (The sensors below are determined to be normal) • Not applicable . AK900147 B-07 (B) Connector: B-07 AD Evaporative emission |