Here's a general overview. Specific steps may vary, so consult a repair manual specific to your 1997 Oldsmobile Aurora. A Haynes or Chilton manual is a good investment for this type of repair.
Safety Precautions:
* Disconnect the negative battery terminal before starting any work on the fuel system.
* Relieve fuel pressure. This is crucial to prevent fuel spraying. Consult your repair manual for the proper procedure – it usually involves using a fuel pressure release valve or repeatedly cranking the engine until the fuel pump stops.
* Work in a well-ventilated area. Fuel fumes are flammable and hazardous.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
General Steps:
1. Access the Fuel Injectors: This usually involves removing parts of the intake manifold, potentially air intake components, and possibly the upper intake plenum. Your repair manual will provide detailed instructions and diagrams showing the location and removal of these parts. Expect to remove some electrical connectors and vacuum lines.
2. Disconnect Fuel Injectors: Each injector will have a wiring harness connector and a fuel line. Carefully disconnect these. Some injectors may have retaining clips.
3. Remove Fuel Injectors: The injectors may be held in place by o-rings. Carefully remove the injectors, paying close attention to the o-rings. You will likely need a fuel injector removal tool to prevent damage.
4. Install New Fuel Injectors: Before installing the new injectors, compare them to the old ones to ensure they are identical. Carefully install the new injectors, making sure the o-rings are properly seated. Again, a fuel injector installation tool is helpful to avoid damage.
5. Reconnect Fuel Injectors: Reconnect the fuel lines and wiring harnesses.
6. Reassemble: Carefully reinstall all components removed earlier in reverse order. Pay attention to the proper torque specifications for all bolts and fasteners – your repair manual will specify these.
7. Reconnect the Battery: Reconnect the negative battery terminal.
8. Check for Leaks: Inspect all fuel lines and connections for leaks.
9. Start the Engine: Start the engine and listen for any unusual noises or check for any fuel leaks.
Important Considerations:
* O-rings: Replace the o-rings on the fuel injectors. Reusing old o-rings is risky and can lead to leaks.
* Fuel Rail: You may need to remove the fuel rail to access the injectors. This may involve disconnecting the fuel lines from the fuel rail and relieving the fuel pressure.
* Fuel Injector Flow Testing: It's a good idea (though not always mandatory) to have your old injectors flow tested to confirm why they need replacing. Similarly, you may want the new injectors flow tested to verify they are functioning correctly.
* Repair Manual: A repair manual specific to your vehicle is absolutely essential. This guide only provides a very general overview. The detailed steps can be significantly different based on vehicle specifics.
This process is complex and requires specific knowledge. Again, if you are not comfortable performing this repair, take your vehicle to a professional mechanic. Working on the fuel system incorrectly can lead to serious damage to your engine or even create a fire hazard.
