my Toyota Corolla E170 (2013-2019) stalls while driving, what's wrong

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, fuel pressure gauge, socket set, torque wrench.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Fuel System Issues

• Fuel Pump Inspection
  • Disconnect the fuel pump connector.
  • Use a fuel pressure gauge to check that the fuel pressure meets manufacturer specifications (usually around 40-50 psi for Corolla).
  • If pressure is low, replace the fuel pump.
• Fuel Filter Replacement
  • Locate the fuel filter (usually near the fuel tank).
  • Disconnect the fuel lines, and replace the filter with a new one.
  • Reconnect fuel lines and check for leaks.

3. Inspect and Replace Ignition Components

• Spark Plug Inspection
  • Remove the spark plugs using a socket wrench.
  • Inspect for wear or carbon build-up; replace if necessary with OEM parts.
• Ignition Coil Testing
  • Disconnect the ignition coil connector.
  • Use a multimeter to test the resistance; replace if out of specification.

4. Check and Clean Air Intake System

• Throttle Body Cleaning
  • Remove the air intake duct to access the throttle body.
  • Use throttle body cleaner and a cloth to clean the throttle body interior.
  • Reassemble the intake duct securely.

5. Address Electrical Issues

• Battery and Alternator Test
  • Use a multimeter to measure the battery voltage (should be around 12.6 volts).
  • With the engine running, check for a voltage of 13.5-14.5 volts at the battery terminals to confirm proper alternator function.
  • Replace the battery or alternator if the readings are out of range.