FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Honda/Accord/8th Generation (2008-2012)/why does my Honda Accord idle rough when stopped

why does my Honda Accord idle rough when stopped

Honda Accord 8th Generation (2008-2012)

Severity: mediumDifficulty: medium2-4 hours
3 min read
563 words

Problem Statement

Learn how to diagnose and fix rough idle issues in Honda Accord. Step-by-step guide with diagnostic procedures and repair instructions.

Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical or fuel systems.
  • ⚠Allow the engine to cool completely before starting work to prevent burns.

Symptoms

  • •Rough engine idle when stationary
  • •Engine stalling at low RPMs
  • •Increased vibrations felt in the cabin
  • •Fluctuating RPM readings on the tachometer
  • •Check engine light illuminated

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
  2. 2Inspect the air intake system for any leaks or obstructions.
  3. 3Check the condition of the spark plugs and ignition coils for wear or damage.
  4. 4Test fuel pressure to ensure the fuel pump is operating within specifications.
  5. 5Examine the engine vacuum for leaks using a smoke test or visual inspection.
  6. 6Inspect the throttle body for carbon buildup or malfunction.

Solution

Solution

1. Preparation

  • Gather tools and parts required for repair.
  • Park the vehicle on a level surface and ensure the engine is cool.
  • Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

  • Tools Required: Socket set, torque wrench, spark plug socket, gap gauge
  • Remove the ignition coil or spark plug wire to access the spark plugs.
  • Use a socket wrench to remove the old spark plugs.
  • Inspect the old plugs for wear and compare them with specifications.
  • Install new spark plugs, ensuring the gap is set to manufacturer specifications (typically between 0.044 inches to 0.050 inches).
  • Torque the new spark plugs to the manufacturer-recommended specifications (usually around 13-16 ft-lbs).

3. Clean or Replace Throttle Body

  • Tools Required: Throttle body cleaner, soft cloth, socket set
  • Remove the air intake duct to access the throttle body.
  • Use throttle body cleaner and a soft cloth to remove carbon buildup from the throttle plate and body.
  • Reassemble the air intake duct securely.

4. Check and Repair Vacuum Leaks

  • Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  • Replace any damaged hoses.
  • If necessary, perform a smoke test to identify hard-to-find leaks.

5. Test and Replace Fuel Filter (if applicable)

  • Tools Required: Fuel line disconnect tool, wrench set
  • Locate and disconnect the fuel lines from the fuel filter.
  • Remove the fuel filter and inspect for blockages.
  • Install a new fuel filter, ensuring the flow direction is correct.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Socket set
  • Torque wrench
  • Spark plug socket
  • Gap gauge
  • Throttle body cleaner
  • Soft cloth
  • Fuel line disconnect tool

Parts Required

  • Spark plugs
  • Fuel filter (if needed)
  • Throttle body gasket (if applicable)

Additional Information

Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

8 items

Parts

3 items

Related Faults

Discover similar issues

  1. my Honda Accord 10th Generation (2018-2022) headlights flicker when I accelerate what’s going on

    Learn how to diagnose and fix flickering headlights during acceleration in Honda Accord 2018-2022. Step-by-step guide with diagnostic procedures and r...

    Component:Electrical
    Symptoms
    • •Headlights flicker or dim during acceleration
    • •Dashboard lights may also flicker
    • +{count} more
  2. how to fix my Honda Accord 10th Generation (2018-2022) check engine light that keeps coming on

    Learn how to diagnose and fix the check engine light issue in Honda Accord 10th Generation (2018-2022). Step-by-step guide with diagnostic procedures ...

    Component:Engine
    Symptoms
    • •Check engine light illuminated
    • •Rough idle when the engine is running
    • +{count} more
  3. my Honda Accord 10th Generation (2018-2022) parking brake won’t release what should I do

    Learn how to diagnose and fix the parking brake issue in Honda Accord 10th Generation (2018-2022). Step-by-step guide with symptoms and solutions.

    Component:Brakes
    Symptoms
    • •Parking brake indicator light remains illuminated on the dashboard
    • •Difficulty in shifting from park to drive or reverse
    • +{count} more
  4. why does my Honda Accord 10th Generation (2018-2022) feel like it’s losing acceleration?

    Learn how to diagnose and fix loss of acceleration in Honda Accord 10th Generation (2018-2022). Step-by-step guide with symptoms, diagnostic steps, an...

    Component:Engine
    Symptoms
    • •Loss of power during acceleration
    • •Engine stalling or hesitation
    • +{count} more
  5. how to replace the cabin air filter in my Honda Accord 10th Generation (2018-2022)?

    Step-by-step guide to replace the cabin air filter in Honda Accord 10th Generation (2018-2022). Improve air quality and HVAC performance with this eas...

    Component:HVAC
    Symptoms
    • •Poor air quality inside the cabin
    • •Reduced airflow from the HVAC system
    • +{count} more
  6. how to identify refrigerant leaks in my Honda Accord 8th Generation (2008-2012) AC system

    Learn how to identify refrigerant leaks in the AC system of your 2008-2012 Honda Accord. Step-by-step guide with diagnostic procedures and repair inst...

    Component:HVAC
    Symptoms
    • •AC system blowing warm air
    • •Unusual hissing or bubbling noise from the AC components
    • +{count} more

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation