why is my Toyota Corolla E140 (2006-2013) losing power while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Air Filter Replacement

• Remove the air intake duct by loosening the clamps with a screwdriver.
• Take out the old air filter and inspect the air filter housing for debris.
• Install a new air filter, ensuring it fits snugly in the housing.
• Reattach the air intake duct and tighten the clamps.

3. Fuel System Inspection

• Connect the fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the "ON" position (without starting) to check fuel pressure; it should be within the manufacturer’s specifications (usually around 30-50 psi).
• If pressure is low, inspect the fuel pump, fuel filter, and fuel lines for blockages or failures.
• Replace the fuel filter if it hasn't been changed recently.

4. Throttle Body Cleaning

• Remove the throttle body by disconnecting the electrical connector and loosening the bolts.
• Clean the throttle body using throttle body cleaner and a soft brush, focusing on the butterfly valve and surrounding areas.
• Reinstall the throttle body and reconnect the electrical connector.

5. Ignition System Check

• Remove spark plugs and inspect for wear or deposits; replace if necessary.
• Test ignition coils with a multimeter for proper resistance according to specification.
• Replace any faulty ignition coils.

6. Vacuum Leak Inspection

• Inspect all vacuum hoses for cracks or disconnections.
• Spray a small amount of brake cleaner around the intake manifold and vacuum hoses while the engine is running; a change in engine RPM indicates a leak.
• Replace any damaged hoses and reseal the intake manifold if necessary.