Sentra L4-1597cc 1.6L DOHC MFI (GA16DE) (1991)
Fuel Injector: Service and Repair
Fuel Pump Fuse Location
REMOVAL
1.
Remove fuel pump fuse.
2.
Turn the ignition to the start position for approximately 15 seconds (this will release the fuel pressure).
3.
Remove or disconnect the following items:
^Fuel hoses
^Fuel pressure regulator vacuum hose
^Fuel injector connectors
NOTE: Make a note or sketch of the position of injector terminals in relation to where the wiring harness was situated. This will aid in
reassembly.
Fuel Injectors And Fuel Rail
4.
Remove the fuel injectors with the fuel rail intact.
WARNING: Do not place the injector or fuel rail in a vise, this may cause irreparable damage.
5.
Remove the injectors from the rail, by removing the retainers and pushing on the tail piece. Do not pull on the connector.
Fuel Rail Assembly Pattern
INSTALLATION
1.
Clean all fittings with a suitable cleaning fluid and dry using air pressure.
2.
Reinstall injectors with new o-rings.
NOTE: Use only unleaded fuel to lubricate fittings.
3.
Install new insulators.
4.
Reinstall fuel rail and torque the bolts
First Torque: 9.3 - 10.8 N-m (0.95 - 1.1 kg/m, 6.9 - 8.0 ft.lbs.)
Final Torque: 16 - 21 N-m (1.6 - 2.1 kg/m, 12 - 15 ft.lbs.)
5.
Reinstall or connect the following:
^Fuel hoses
^Fuel pressure regulator vacuum hose
^Fuel injector connectors
6.
Reinstall the fuel pump fuse.