why does my Toyota Corolla E140 (2006-2013) have poor acceleration?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts during repairs.

2. Clean the Throttle Body

• Remove the air intake duct to access the throttle body.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding areas.
• Ensure the throttle plate moves freely and does not stick.

3. Replace Spark Plugs

• Remove the ignition coil or spark plug wires.
• Use a spark plug socket to remove the old spark plugs.
• Check and adjust the gap on new spark plugs as per manufacturer specifications.
• Install new spark plugs and reconnect ignition components.

4. Inspect and Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Inspect the air filter housing for debris and clean if necessary.
• Install a new air filter, ensuring a snug fit.

5. Fuel System Inspection

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (without starting the engine) to check the fuel pressure.
• If pressure is below specifications, consider replacing the fuel pump or filter.

6. Exhaust System Check

• Visually inspect the exhaust system for damage or blockages.
• If a clogged catalytic converter is suspected, conduct a backpressure test.
• Replace the catalytic converter if backpressure exceeds manufacturer specifications.