how to fix fuel economy issues in Toyota Corolla E140 (2006-2013)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine off.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Replace Air Filter

• Locate the air filter housing.
• Open the housing clips or screws using a screwdriver.
• Remove the old air filter and clean the housing with a damp cloth.
• Install a new air filter, ensuring it is seated properly.
• Reattach the housing cover and secure it with clips or screws.

3. Clean or Replace Fuel Injectors

• Remove the fuel rail by disconnecting any electrical connectors and unscrewing the mounting bolts.
• Carefully detach the fuel injectors from the rail.
• Use a fuel injector cleaning kit to clean the injectors, or replace them if they are damaged.
• Reinstall the cleaned or new fuel injectors onto the fuel rail and secure it back in place.

4. Inspect and Replace Spark Plugs

• Locate the ignition coils and unscrew them to access the spark plugs.
• Remove the spark plugs using a spark plug socket and ratchet.
• Inspect the spark plugs for wear; replace if necessary with OEM specifications.
• Apply anti-seize compound on the threads of the new spark plugs and torque them to the manufacturer's specifications (typically 13-16 lb-ft).
• Reinstall the ignition coils.

5. Tire Maintenance

• Check tire pressure using a tire pressure gauge and inflate tires to the recommended PSI as stated on the door jamb sticker.
• Inspect tire tread for uneven wear and replace tires if needed.

6. Exhaust System Inspection

• Inspect the exhaust system visually for any holes or leaks.
• If blockages are found, remove the affected sections and replace with OEM or equivalent parts.

7. Fuel System Check

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "ON" position (do not start) to check for proper fuel pressure.
• If pressure is low, inspect or replace the fuel pump as needed.