how to fix the engine misfire in my Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Ensure the engine is cool before beginning work.

2. Replace Spark Plugs

• Tools Required: Socket set (with spark plug socket), torque wrench, dielectric grease.
• Remove the engine cover if necessary.
• Disconnect the ignition coils from the spark plugs.
• Remove the old spark plugs using the spark plug socket.
• Inspect the spark plug gap; adjust or replace as necessary.
• Apply a small amount of dielectric grease to the threads of new spark plugs.
• Install new spark plugs and torque to the manufacturer's specifications (typically around 13-15 ft-lbs).
• Reconnect the ignition coils.

3. Test Ignition Coils

• Tools Required: Multimeter.
• Remove the ignition coils from their respective positions.
• Test the primary and secondary resistance using a multimeter.
• If any coils are out of specification, replace them.
• Reinstall the ignition coils securely.

4. Check Fuel Injectors

• Tools Required: Fuel pressure gauge, injector cleaner.
• Connect the fuel pressure gauge to the fuel rail and check for proper fuel pressure as specified by the manufacturer.
• If pressure is low, inspect the fuel pump and filter.
• Use an injector cleaner to clean the injectors if they are found to be clogged.
• Reinstall all components securely.

5. Inspect Air Intake System

• Visually inspect the air intake for any cracks or loose connections.
• Clean the mass air flow (MAF) sensor with MAF cleaner if necessary.
• Ensure that the air filter is clean and replace if dirty.