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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-709 . TECHNICAL DESCRIPTION • The fuel tank may be under a slight pressure or vacuum depending on the state of the Evapora- • The PCM 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 PCM 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 Other Monitor (There is no temporary DTC stored in memory for the item monitored below) • Evaporative emission purge solenoid monitor • Evaporative emission purge system monitor • Fuel tank differential pressure sensor monitor • Evaporative emission ventilation solenoid monitor • Fuel level sensor monitor • Fuel temperature sensor monitor Sensor (The sensors below are determined to be normal) • Mass airflow sensor • Barometric pressure sensor • Intake air temperature sensor • Engine coolant temperature sensor . AC305053AC EVAPORATIVE EMISSION |