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I would like to know how to change the fuel injectors on a…

Good evening all. I would...
Good evening all. I would like to know how to change the fuel injectors on a 2003 Nissan Sentra?
1.8L. Thanks, ***** ***** website would carry the injectors?
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Answered in 16 minutes by:
12/25/2016
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Nissan
Satisfied Customers: 4,833
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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Hey how are you .

1- this is the steps to remove & replace the fuel injector as requested

2- please click on the link to view all 10 diagrams on it

FUEL INJECTOR AND FUEL TUBE

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FUEL INJECTOR AND FUEL TUBE

CAUTION: Apply new engine oil when installing the parts that specified to do so in the figure. Do not remove or disassemble parts unless instructed as shown above.

REMOVAL
1. Release the fuel pressure.
2. Disconnect the intake manifold bracket.
3. Remove the PVC hose and bracket.
4. Disconnect the sub-harness for the fuel injectors.

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5. Disconnect the fuel quick connector on the engine side.
- Using the quick connector release tool (hereinafter called "release tool"), perform the following steps to disconnect quick connector.

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a. Remove quick connector cap.

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b. With the sleeve side of release facing quick connector, install release tool onto fuel tube.
c. Insert release tool into quick connector until sleeve contacts and goes no further. Hold the release tool on that position.

CAUTION: Inserting the release tool hard will not disconnect quick connector. Hold release tool where it contacts and goes no further.

d. Pull the quick connector straight out from the fuel tube.

CAUTION: Pull quick connector holding it at the "A".position, as shown in illustration.
Do not pull with lateral force applied. O-ring inside quick connector may be damaged. Prepare container and cloth beforehand as fuel will leak out.
Avoid fire and sparks.
Be sure to cover openings of disconnected pipes with plug or plastic bag to avoid fuel leakage and entry of foreign materials.

6. When removing fuel hose quick connector at vehicle piping side, perform as follows.

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a. Remove quick connector cap.
b. Hold the sides of the connector, push in tabs and pull out the tube. (The figure is shown for reference only.)
If the connector and the tube are stuck together, push and pull several times until they start to move. Then disconnect them by pulling.

CAUTION: The tube can be removed when the tabs are completely depressed. Do not twist it more than necessary.
Do not use any tools to remove the quick connector.
Keep the resin tube away from heat. Be especially careful
Prevent acid liquid such as battery electrolyte etc. from getting on the resin tube.
Do not bend or twist the tube during installation and removal. Do not remove the remaining retainer on tube. When the tube is replaced, also replace the retainer with a new one. Retainer color: Green.
To keep clean the connecting portion and to avoid damage and foreign materials, cover them completely with plastic bags or something similar.

7. Remove the fuel injectors from the fuel tube, as follows:
a. Release the clip, and remove the fuel injector.
b. Pull the fuel injector straight out of the fuel tube.

CAUTION: Be careful not to damage the nozzle.
Avoid any impact, such as dropping the fuel injector.
Do not disassemble or adjust the fuel injector.

INSTALLATION
1. Installation is in the reverse order of removal.
- Install new O-rings on the fuel injectors.
- Lubricate the new O-rings lightly with new engine oil.
- Be careful not to scratch the injector during installation. Also be careful not to twist or stretch the O-ring. If the O-ring was stretched while it was installed, do not insert it into the fuel tube immediately.

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a. Install the fuel injector into the fuel tube with the following procedure:
- Do not reuse the clip, replace it with a new one.
- Insert the clip into the clip mounting groove on the fuel injector.
- Insert clip so that projection A of fuel injector matches notch A of the clip.

b. Insert fuel injector into fuel tube with clip attached.
- Insert it while matching it to the axial center. Insert fuel injector so that projection B of fuel injector matches notch B of the clip.
- Make sure that fuel tube flange is securely fixed in flange fixing groove on the clip.
- Make sure that installation is complete by checking that fuel injector does not rotate or come off.

c. Install the fuel tube assembly with the following procedure:
- Insert the tip of each fuel injector into the intake manifold.

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- Tighten the fuel tube mounting bolts in two stages in the numerical order shown.

Stage 1:.................12 - 14 Nm (1.2 - 1.4 kg-m, 9 - 10 ft. lbs.)
Stage 2:..................17 - 24 Nm (1.7 - 2.4 kg-m, 12 - 17 ft. lbs.)

CAUTION: After properly connecting fuel tube assembly to injector and fuel hose, check connection for fuel leakage.

CONNECTING QUICK CONNECTOR ON THE FUEL HOSE (ENGINE SIDE)
1. Make sure no foreign substances are deposited in and around the fuel tube and quick connector, and there is no damage to them.
2. Thinly apply new engine oil around the fuel tube tip end.

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3. Align center to insert quick connector straight into fuel tube.
Insert fuel tube into quick connector until the top spool on fuel tubes is inserted completely and the second level spool is positioned slightly below the quick connector bottom end.

CAUTION: Hold at position "A" is shown, when inserting the fuel tube into the quick connector.
Carefully align to center to avoid inclined insertion to prevent damage to the O-ring inside the quick connector.
Insert the fuel tube until you hear a "click" sound and actually feel the engagement.
To avoid misidentification of engagement with a similar sound, be sure to perform the next step.

4. Before clamping the fuel hose with the hose clamp, pull the quick connector hard by hand, holding at the "A" position, as shown. Make sure it is completely engaged (connected) so that it does not come off of the fuel tube.

NOTE: Recommended pulling force is 50 N (5.1 kg, 11.2 lb).

5. Install Quick connector cap on Quick connector joint.

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Direct arrow mark on quick connector cap to upper side (fuel hose side).

6. Install fuel hose to hose clamp.

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CONNECTING QUICK CONNECTOR ON THE FUEL HOSE (VEHICLE PIPING SIDE)
1. Make sure no foreign substances are deposited in and around the fuel tube and quick connector, and there is no damage to them.
2. Align center to insert quick connector straight into fuel tube. Insert fuel tube until a click is heard. Install quick connector cap on quick connector joint. Direct arrow mark on quick connector cap upper side.
-Install fuel hose to hose clamp.

INSPECTION AFTER INSTALLATION
Make sure there is no fuel leakage at connections as follows:
1. Apply fuel pressure to fuel lines by turning ignition ON (with engine stopped). Then check for fuel leaks at connections.
2. Start the engine and rev it up and check for fuel leaks at connections.

NOTE: Use mirrors for checking on hard to see points of the fuel system.

CAUTION: Do not touch the engine immediately after stopping, as the engine becomes extremely hot.

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Thank You
Chad Farhat
ASE Certified Technician

Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Nissan
Satisfied Customers: 4,833
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
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Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Nissan
Satisfied Customers: 4,833
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Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles

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