how to fix a misfire in my Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plugs

• Tools Required: Socket set, ratchet, spark plug socket, torque wrench.
• Remove the ignition coil cover if applicable.
• Unplug the ignition coil connectors and remove the coils using the socket set.
• Remove the old spark plugs using a spark plug socket.
• Install the new spark plugs by hand to avoid cross-threading, then torque them to the manufacturer’s specification (typically 13-15 lb-ft).
• Reinstall the ignition coils and reconnect the connectors.

3. Inspect and Replace Ignition Coils (if necessary)

• Tools Required: Socket set, ratchet.
• If the ignition coils show signs of wear or damage, replace them.
• Remove the faulty ignition coil and install the new one, ensuring it is seated properly.
• Reconnect the electrical connectors.

4. Test and Replace Fuel Injectors (if necessary)

• Tools Required: Fuel pressure gauge, injector cleaning kit or replacement injectors.
• Check fuel injector operation using a multimeter or by listening for clicking sounds while the engine is running.
• If injectors are faulty, remove them using the socket set, and install new injectors according to the manufacturer’s specifications.

5. Check Vacuum Lines and Intake System

• Inspect all vacuum lines for cracks or disconnections.
• Replace any damaged hoses.
• Check the intake manifold for leaks by spraying a small amount of carb cleaner around the gasket while the engine is running; if the idle changes, there is a leak.