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    1995 Nissan/Datsun Altima 2.4L SFI DOHC 4cyl

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    1720 S RIDGEWOOD A
    (386) 427-1210

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    See Details

    Fuel Injector

    Inspect/Test/Service/Replace

    • Often an individual injector needs to be replaced.
    • Random dissassembly of the components and improper procedures can result in damage to one of the various systems located near the injectors.
    • The injectors are normally attached directly to a fuel rail and inserted into the intake manifold or cylinder head.
    • They must be positively sealed because high pressure fuel leaks can cause a serious safety hazard.
    • Prior to loosening any fitting in the fuel system, the fuel pump fuse should be removed.
    • As an extra precaution, disconnect the negative cable at the battery.
    • To remove an injector, the fuel rail must be able to move away from the engine.
    • The rail-holding brackets should be unbolted and the vacuum line to the pressure regulator disconnected.
    • Disconnect the wiring harness to the injectors by depressing the center of the attaching wire clip.
    • The injectors are held to the fuel rail by a clip that fits over the top of the injector.
    • O-rings at the top and at the bottom of the injector seal the injector.
    • Pull up on the fuel rail assembly.
    • The bottoms of the injectors will pull our of the manifold while the tops are secured to the rail by clips.
    • Remove the clip from the top of the injector and remove the injector unit.
    • Install new O-rings onto the new injector.
      • Be careful not to damage the seals while installing them, and make sure they are in their proper locations.
    • Lightly lubricate the sealing ring with engine oil or automatic transmission fluid (avoid using silicone grease, which tends to clog the injectors) to prevent seal distortion or damage.
    • Install the injector into the fuel rail and set the rail assembly into place.
    • Tighten the fuel rail hold-down bolts according to manufacturer's specifications.
    Art courtesy of Delmar - Thomson Learning.
    • Reconnect all parts that were disconnected.
    • Install the fuel pump fuse and reconnect the battery.
    • Turn the ignition switch to the run position and check the entire system for leaks.
    • After a visual inspection has been completed, conduct a fuel pressure test on the system.

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