Fuel Pump Circuit

Turn ignition on, leave engine off. Fuel pump should operate for 2 seconds. If fuel pump does not operate, check fuses, fuel pump control relay, fuel pump, all electrical connections and ECM. See I - SYS/COMP TESTS article.

NOTE: Fuel pump performance is a measurement of fuel pressure availability, not regulated pressure.

FUEL PUMP PERFORMANCE

Application

⁽¹⁾ psi (kg/cm² )

DOHC

⁽²⁾ 35.5-38.4 (2.5-2.7)

SOHC

⁽³⁾ 22.7-29.9 (1.6-2.1)

⁽¹⁾	Specification is listed with ignition on and engine off.

⁽²⁾	Pressure should remain at 25.6 psi (1.8 kg/cm² ) for one minute after fuel pump is turned off.

⁽³⁾	Pressure should remain at 12.8 psi (.9 kg/cm² ) for one minute after fuel pump is turned off.

REGULATED FUEL PRESSURE

Application

⁽¹⁾ psi (kg/cm² )

DOHC

⁽²⁾ 25.6-29.9 (1.8-2.1)

SOHC

⁽³⁾ 12.8-20.0 (.9-1.4)

⁽¹⁾	Specification is listed with engine idling.

⁽²⁾	Pressure should remain at 25.6 psi (1.8 kg/cm² ) for one minute after fuel pump is turned off.

⁽³⁾	Pressure should remain at 12.8 psi (.9 kg/cm² ) for one minute after fuel pump is turned off.