my Toyota Corolla E170 (2013-2019) is using too much fuel, what could be the cause

Solution

1. Preparation

• Gather necessary tools and parts.
• Make sure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to ensure safety while working.

2. Replace Air Filter

• Remove the air intake cover by unscrewing the necessary bolts.
• Take out the old air filter and inspect it for dirt and damage.
• Install a new air filter, ensuring it is seated properly.
• Reattach the air intake cover and secure it with bolts.

3. Inspect and Clean Fuel Injectors

• If injector cleaning is required, remove the fuel rail by disconnecting fuel lines and unbolting it from the intake manifold.
• Use a fuel injector cleaning kit to clean the injectors, following the manufacturer's instructions.
• Reinstall the fuel rail and reconnect fuel lines, ensuring no leaks.

4. Check and Replace Fuel Pressure Regulator (if necessary)

• Locate the fuel pressure regulator on the fuel rail.
• Disconnect the vacuum line and electrical connector.
• Remove the regulator using appropriate sockets.
• Install the new fuel pressure regulator and reconnect the lines.

5. Inspect Exhaust System

• Raise the vehicle using jack stands and inspect the exhaust system for any visible damage or blockages.
• If the catalytic converter is clogged, replace it with a new one according to manufacturer specifications.

6. Check Tire Pressure and Condition

• Use a tire pressure gauge to check the pressure of all tires.
• Inflate to the manufacturer's recommended PSI if any tires are under-inflated.
• Inspect tires for excessive wear; replace if necessary.