why does my Toyota Highlander XU70 (2020-Present) have poor acceleration when I press the gas?

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and securely raise it if necessary.

2. Clean or Replace the Throttle Body

• Sub-steps:
  1. Remove the air intake duct connected to the throttle body using a socket set.
  2. Disconnect the throttle position sensor electrical connector.
  3. Remove the throttle body mounting bolts with a socket set.
  4. Clean the throttle body using throttle body cleaner and a soft cloth, or replace it if damaged.
  5. Reinstall the throttle body and reconnect the sensor and air intake duct.

3. Inspect and Replace the Fuel Filter (if applicable)

• Sub-steps:
  1. Locate the fuel filter (if external, it may be near the fuel tank).
  2. Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
  3. Disconnect the fuel lines from the filter using the appropriate line removal tool.
  4. Install the new filter in the correct orientation.
  5. Reconnect the fuel lines and replace the fuel pump fuse.

4. Replace the Mass Airflow Sensor (if needed)

• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector.
  3. Remove the mounting screws holding the MAF in place.
  4. Install the new MAF sensor and secure it with screws.
  5. Reconnect the electrical connector.