my Honda Accord stalls when I stop what could be wrong

Solution

1. Preparation

• Tools Required: OBD-II scanner, throttle body cleaner, fuel pressure gauge, socket set, torque wrench.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Clean Throttle Body

• Remove the air intake duct connected to the throttle body.
• Spray throttle body cleaner into the throttle body while opening the throttle plate manually.
• Wipe clean with a lint-free cloth.
• Reinstall the air intake duct and reconnect the negative battery terminal.

3. Test Fuel Pressure

• Attach the fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the "ON" position (do not start) and record the pressure reading.
• If the pressure is below the manufacturer's specifications, replace the fuel pump.
• Disconnect the gauge and reinstall the service port cap.

4. Inspect and Clean IAC Valve

• Locate the IAC valve, typically mounted on the throttle body.
• Remove the IAC valve using a socket set.
• Clean any carbon buildup with throttle body cleaner and a soft brush.
• Reinstall the IAC valve and torque to manufacturer specifications.

5. Check MAF Sensor

• Disconnect the MAF sensor connector.
• Remove the MAF sensor from the air intake tube.
• Clean the sensor using MAF cleaner (do not touch the sensor element).
• Reinstall the MAF sensor and reconnect the electrical connector.

6. Replace Spark Plugs (if necessary)

• If spark plugs show signs of wear or fouling, remove them using a socket set.
• Check the gap on the new spark plugs and adjust as necessary.
• Install new spark plugs and torque to manufacturer specifications.