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2012
honda civic22 views

Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2012 honda civic Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

1
medium$150-$300
Replace faulty ignition coils to resolve engine misfire and rough idle.
Source: https://www.reddit.com/r/Honda/comments/tcau70/2012_honda_civic_misfire/

Repair Steps:

  1. Identify the faulty ignition coil using an OBD-II scanner.
  2. Remove the engine cover to access the ignition coils.
  3. Disconnect the electrical connector and remove the faulty ignition coil.
  4. Install the new ignition coil and reconnect the electrical connector.
  5. Reinstall the engine cover and clear any error codes with the OBD-II scanner.
2
medium$100-$200
Inspect and repair any vacuum leaks that may be causing rough idle.
Source: https://repairpal.com/honda/civic/2012/rough-idle

Repair Steps:

  1. Use a smoke machine to identify any vacuum leaks in the intake system.
  2. Inspect hoses and connections for cracks or disconnections.
  3. Replace any damaged hoses or tighten loose connections.
  4. Test the vehicle to ensure the rough idle issue is resolved.
3
easy$50-$100
Replace spark plugs to address misfire issues.
Source: https://www.facebook.com/groups/talkbedford/posts/2331503147206554/

Repair Steps:

  1. Remove the engine cover to access the spark plugs.
  2. Use a spark plug socket to remove the old spark plugs.
  3. Check the gap on the new spark plugs to ensure they are correct.
  4. Install the new spark plugs and tighten them to the specified torque.
  5. Reinstall the engine cover and test the vehicle for improved performance.
4
medium$30-$60
Clean the throttle body and mass airflow sensor to improve idle stability.
Source: https://www.youtube.com/watch?v=SFeP4jpJox0

Repair Steps:

  1. Disconnect the battery to ensure safety.
  2. Remove the air intake hose to access the throttle body.
  3. Use throttle body cleaner to clean the throttle plate and surrounding areas.
  4. Remove and clean the mass airflow sensor with appropriate cleaner.
  5. Reassemble the components and reconnect the battery.

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