my Honda Accord stalls at red lights what could be wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Clean the Throttle Body

• Remove the air intake duct connected to the throttle body using a socket set.
• Spray throttle body cleaner into the throttle body while opening the throttle plate manually.
• Wipe clean with a lint-free cloth and reassemble the duct.

3. Inspect and Test the Idle Air Control Valve

• Locate the IAC valve on the throttle body.
• Disconnect the electrical connector and remove the IAC valve using a socket set.
• Inspect for carbon buildup; clean if necessary.
• Test the valve operation using a multimeter; replace if it does not meet specifications.

4. Check for Vacuum Leaks

• Visually inspect all vacuum hoses connected to the intake manifold.
• Use a smoke machine or spray brake cleaner around the hoses and intake manifold while the engine is idling; listen for changes in engine RPM indicating a leak.
• Replace any damaged hoses or seals.

5. Reconnect Battery and Reset Engine Control Unit

• Reconnect the negative battery terminal.
• Clear any error codes from the OBD-II scanner.
• Start the engine and let it idle to observe for stalling.