why does my Toyota RAV4 randomly stall while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.
• Ensure the vehicle is parked on a flat surface and the parking brake is engaged.

2. Fuel System Inspection

• Sub-step 1: Remove the fuel pump relay from the fuse box.
• Sub-step 2: Use a fuel pressure gauge to connect to the fuel rail.
• Sub-step 3: Turn the ignition to the "ON" position (do not start the engine) and check for the fuel pressure reading; it should be within manufacturer specifications (usually between 35-50 psi).
• Sub-step 4: If pressure is low, replace the fuel pump.

3. Ignition System Repair

• Sub-step 1: Remove the spark plug wires and inspect for corrosion or wear; replace if needed.
• Sub-step 2: Remove and inspect spark plugs for carbon buildup or damage; replace with OEM spark plugs if necessary.
• Sub-step 3: Test ignition coils with a multimeter; replace if resistance is out of specification.

4. Throttle Position Sensor Replacement

• Sub-step 1: Disconnect the electrical connector from the throttle position sensor.
• Sub-step 2: Remove the mounting screws and take out the old TPS.
• Sub-step 3: Install the new TPS and secure it with screws; reconnect the electrical connector.

5. Air Intake System Check

• Sub-step 1: Remove the air filter and inspect it for dirt or blockages; replace if necessary.
• Sub-step 2: Inspect the intake duct for cracks or loose connections and replace or tighten as needed.