my Honda Accord stalls when I stop at red lights what could be wrong

Solution

1. Preparation

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

2. Clean Throttle Body

• Remove the air intake duct to access the throttle body.
• Using throttle body cleaner and a soft brush, carefully clean the throttle body and the butterfly valve.
• Reinstall the air intake duct, ensuring a secure fit.

3. Inspect and Clean IAC Valve

• Locate the idle air control valve, typically mounted on the throttle body.
• Disconnect the electrical connector and remove the IAC valve from its housing.
• Clean the IAC valve with appropriate cleaner, removing carbon deposits.
• Reinstall the IAC valve and reconnect the electrical connector.

4. Fuel Pressure Test

• Connect the fuel pressure gauge to the fuel rail.
• Start the engine and observe the fuel pressure reading; it should meet the manufacturer's specifications (usually around 30-50 psi).
• If the pressure is low, inspect the fuel pump and fuel filter for issues.

5. Address Engine Codes

• If diagnostic trouble codes are present, research each code to determine the specific repairs needed.
• Clear the codes using the OBD-II scanner after repairs are made.