why does my Toyota Highlander Fourth Generation (2020-present) feel like it's losing power

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before proceeding with repairs.

2. Addressing Fuel System Issues

1. Check Fuel Pressure
   • Connect the fuel pressure gauge to the fuel rail.
   • Turn the ignition to the "ON" position without starting the engine to check the pressure.
   • Compare the reading to manufacturer specifications (usually around 50-60 psi).
   • If pressure is low, inspect and replace the fuel pump or fuel filter as necessary.

3. Inspecting Air Intake System

1. Remove Air Filter

   • Open the air filter housing and take out the air filter.
   • Inspect for dirt or blockages; replace if necessary.

2. Check Intake Hoses

   • Visually inspect all hoses connected to the intake for cracks or disconnections.
   • Replace any damaged hoses to ensure proper airflow.

4. Examining Ignition System

1. Inspect Spark Plugs

   • Remove spark plugs using a socket set.
   • Check for wear, carbon deposits, or damage; replace if necessary.

2. Test Ignition Coils

   • Disconnect the ignition coil connectors.
   • Test each coil's resistance with a multimeter and replace any that are out of spec.

5. Testing Sensors

1. Throttle Position Sensor (TPS)

   • Locate the TPS on the throttle body.
   • Use a multimeter to check the voltage output while moving the throttle plate. Replace if readings are inconsistent.

2. Mass Airflow Sensor (MAF)

   • Disconnect the MAF sensor and clean it using MAF cleaner.
   • Reconnect and test the sensor's output with a multimeter; replace if faulty.