why does my Honda Pilot YF3 (2016-2022) engine misfire when I accelerate?

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Replace Spark Plugs

• Remove the ignition coil covers if applicable.
• Disconnect the ignition coils from the spark plugs.
• Unscrew and remove the old spark plugs using a spark plug socket.
• Install new spark plugs, ensuring they are properly gapped according to manufacturer specifications (typically around 0.043 inches for Honda).
• Reconnect the ignition coils and covers.

3. Inspect and Replace Ignition Coils

• Remove the ignition coils from the engine by unscrewing them.
• Test each coil with an ohmmeter; replace any that are outside the manufacturer’s resistance range.
• Install new ignition coils, ensuring they are seated properly and tightened to manufacturer torque specifications (usually around 8 lb-ft).

4. Clean or Replace Fuel Injectors

• Remove the fuel rail from the engine, taking care to relieve fuel pressure beforehand.
• Inspect and clean the fuel injectors with a cleaner or replace them if clogged.
• Reinstall the fuel rail and ensure all connections are secure.

5. Test Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position without starting the engine to check pressure; it should be within the manufacturer’s specifications (typically 30-50 psi).
• If pressure is low, inspect and potentially replace the fuel pump or fuel filter.

6. Check and Clean Air Intake System

• Inspect the air filter and replace if dirty.
• Clean the mass airflow sensor with appropriate sensor cleaner.
• Ensure there are no leaks in the intake ducts.