my Honda Accord has a significant drop in fuel economy what to check

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid any electrical issues.

2. Air Filter Replacement

• Remove the air filter housing cover using a socket set.
• Take out the old air filter and inspect the housing for debris.
• Install a new air filter, ensuring it sits correctly in the housing.
• Reattach the air filter housing cover and secure it with bolts.

3. Fuel System Cleaning

• Use a fuel system cleaner additive compatible with your vehicle.
• Follow the instructions on the cleaner to add it to the fuel tank.
• Alternatively, remove the fuel injectors and clean them using an ultrasonic cleaner if heavily clogged.

4. Spark Plug Inspection/Replacement

• Remove the ignition coil or spark plug wires.
• Use a spark plug socket to remove the spark plugs.
• Inspect for wear or deposits; replace with new spark plugs if necessary.
• Reinstall the spark plugs and reattach the ignition coils or wires.

5. Tire Pressure Adjustment

• Use a tire pressure gauge to check each tire's pressure.
• Inflate tires to the recommended PSI as indicated on the driver’s side door jamb.
• Replace any tires that are excessively worn or damaged.