how to fix the fuel injector issues in my Volvo XC60 536 (2017-Present)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, fuel pressure gauge, multimeter, socket set, torque wrench, cleaning solvent, safety glasses, gloves.
• Disconnect the battery to prevent any electrical shorts.
• Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.

2. Remove Fuel Injectors

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the electrical connectors from each fuel injector.
  3. Remove the fuel rail mounting bolts using a socket set.
  4. Carefully lift the fuel rail off the intake manifold, ensuring the injectors come out with it.
  5. Remove the fuel injectors from the rail by pulling them straight out, taking care not to damage O-rings.

3. Clean or Replace Injectors

• Sub-steps:
  1. Inspect each injector for cracks or wear; replace if necessary.
  2. If cleaning, use an ultrasonic cleaner with a suitable solvent to remove carbon deposits.
  3. Dry and inspect the O-rings; replace if damaged or worn.
  4. Reinstall the cleaned or new injectors back into the fuel rail.

4. Reinstall Fuel Rail

• Sub-steps:
  1. Apply a small amount of engine oil to the O-rings of the injectors.
  2. Align the fuel rail with the intake manifold and press down until the injectors seat properly.
  3. Secure the fuel rail with the mounting bolts, tightening to the manufacturer’s specifications (typically around 10-15 Nm).
  4. Reconnect the electrical connectors to each injector.

5. Reconnect Battery and Test

• Reinstall the fuel pump fuse and reconnect the battery.
• Turn the ignition to the "on" position without starting the engine to prime the fuel system.
• Check for leaks around the injectors and rail.
• Start the engine and let it idle, observing for smooth operation.