my Honda Pilot YF3 (2016-2022) has a hard time starting when it's hot, why?

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to ensure safety while working on the electrical system.

2. Fuel System Inspection

• Tools Required: Fuel pressure gauge, wrench set.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "ON" position without starting the engine to check fuel pressure; it should meet manufacturer specifications (typically around 40-50 psi).
• If pressure is low, inspect the fuel pump and filter for blockage or failure.

3. Ignition System Check

• Tools Required: Multimeter, socket set.
• Remove the spark plugs and inspect for wear and carbon deposits.
• Use a multimeter to test the ignition coils for resistance; replace any faulty coils.
• Reinstall the spark plugs with the correct torque (usually around 13-15 ft-lbs).

4. Engine Temperature Sensor Testing

• Tools Required: Multimeter.
• Locate the engine temperature sensor and disconnect the wiring harness.
• Use a multimeter to measure resistance; compare readings to manufacturer specifications.
• Replace the sensor if readings are out of spec.

5. Battery and Starter Check

• Tools Required: Battery tester, socket set.
• Test the battery voltage under load; it should be above 12.4 volts.
• Inspect the starter motor for signs of overheating or failure.
• Clean battery terminals and connections to ensure solid contact.

6. Reassembly

• Reconnect all components and wiring harnesses.
• Reconnect the negative battery terminal.
• Ensure all tools are removed from the engine bay before starting the vehicle.