my Honda Pilot YF3 (2016-2022) runs rough after filling up with gas, why?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to prevent electrical shorts.

2. Inspect and Replace Fuel Filler Cap

• Remove the fuel filler cap and inspect it for cracks or wear.
• If damaged, replace the fuel filler cap with a new one.
• Ensure the new cap is properly seated and clicks into place.

3. EVAP System Inspection

• Visually inspect all EVAP hoses for signs of cracks or disconnections.
• Replace any damaged hoses.
• Inspect the charcoal canister for signs of damage or blockage.
• If necessary, replace the charcoal canister according to manufacturer specifications.

4. Fuel Pressure Test

• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine and check the pressure reading.
  • It should typically be between 30-40 psi (or as specified in the service manual).
• If the pressure is low, investigate the fuel pump and filter, replacing as needed.

5. Fuel Injector Cleaning/Replacement

• If fuel injectors are suspected to be blocked, use a fuel injector cleaning kit to clean them.
• If cleaning is ineffective, remove and replace the fuel injectors with new ones, ensuring proper seating and connection.

6. Reassemble and Test

• Reconnect the negative terminal of the battery.
• Start the engine and let it idle for a few minutes.
• Observe for any irregularities in idling or engine performance.