Here's a general outline of the process. This is *not* a comprehensive guide, and specific steps may vary slightly depending on your specific engine (1.6L or 1.8L). Always consult a repair manual specific to your 1990 Acura Integra RS for detailed instructions and torque specifications.
Tools You'll Likely Need:
* Socket Set: Various sizes, including metric.
* Wrench Set: Both metric and potentially SAE.
* Fuel Line Disconnect Tool: To safely disconnect the fuel lines without damaging them.
* Fuel Pressure Gauge: To relieve fuel pressure in the system (crucial for safety).
* Torque Wrench: To properly tighten bolts to prevent leaks and damage.
* Shop Rags/Paper Towels: For cleaning.
* New Fuel Injectors: Make sure you get the correct ones for your engine.
* Fuel Injector O-rings and Seals (if needed): These often need replacing.
* Container for Fuel: To catch any spilled fuel.
* Jack and Jack Stands: To safely lift the car.
* Possibly a Fuel Pressure Regulator Wrench: Depending on the design.
General Steps (Highly Simplified):
1. Safety First: Disconnect the negative battery terminal. This is crucial to prevent electrical shorts and shocks.
2. Relieve Fuel Pressure: This is the most critical safety step. Use the fuel pressure gauge and the appropriate procedure from your repair manual to safely relieve pressure in the fuel system. Failure to do so could result in fuel spraying when you disconnect the lines.
3. Access the Fuel Injectors: This usually involves removing parts of the intake manifold, possibly the upper intake plenum. This will vary greatly depending on whether you have a 1.6 or 1.8L engine. Your repair manual will guide you here.
4. Disconnect Fuel Lines and Electrical Connectors: Carefully disconnect the fuel lines using the fuel line disconnect tool. Label the lines clearly to avoid confusion during reassembly. Disconnect the electrical connectors to the injectors.
5. Remove the Fuel Injectors: The injectors are typically held in place by clips or retaining rings. Carefully remove them, taking note of their orientation.
6. Install New Fuel Injectors: Install the new fuel injectors, ensuring the O-rings and seals are properly seated. If using new O-rings, lubricate them lightly with fuel-resistant lubricant.
7. Reconnect Everything: Reconnect the electrical connectors and fuel lines, ensuring a secure connection.
8. Reinstall Components: Reinstall all removed components in the reverse order of removal. Pay close attention to torque specifications for bolts and fasteners.
9. Check for Leaks: After reassembly, carefully inspect for any fuel leaks.
10. Reconnect Battery Terminal: Reconnect the negative battery terminal.
11. Start the Engine and Check for Proper Operation: Start the engine and check for smooth operation. Look for any leaks or unusual sounds.
Disclaimer: This is a simplified overview. There are many details and nuances to this procedure that are not included here. Always consult a detailed repair manual specific to your 1990 Acura Integra RS before attempting this repair. Failure to follow proper procedures can lead to serious injury or damage to your vehicle. If you're unsure about any step, seek professional help.
