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2005
toyota corolla4 views

Rough Idle or Engine Misfire

Expert diagnosis and repair solutions for 2005 toyota corolla Rough Idle or Engine Misfire. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

1
medium$150-$250
Replace the ignition coils and spark plugs to resolve engine misfire and rough idle.
Source: https://www.reddit.com/r/toyotacorolla/comments/13w95lo/109k_miles_2005_corolla_rough_idle/

Repair Steps:

  1. Purchase new ignition coils and spark plugs
  2. Remove the engine cover to access the ignition coils
  3. Unplug the electrical connectors and remove the old coils
  4. Install the new ignition coils and spark plugs
  5. Reattach the engine cover
2
hard$200-$400
Inspect and replace the intake manifold gasket to fix vacuum leaks causing rough idle.
Source: https://www.toyotanation.com/threads/2003-corolla-running-rough-and-misfiring-really-need-your-help-madison-wi.395121/

Repair Steps:

  1. Remove the intake manifold
  2. Inspect the gasket for signs of wear or damage
  3. Replace the gasket with an upgraded version
  4. Reinstall the intake manifold ensuring a proper seal
  5. Test the engine for leaks and performance
3
easy$10-$50
Clean the Mass Air Flow (MAF) sensor and throttle body to improve idle quality.
Source: https://www.toyotanation.com/threads/rough-idle-2005-corolla.1644196/

Repair Steps:

  1. Disconnect the battery
  2. Remove the MAF sensor and clean it with MAF cleaner
  3. Remove the throttle body and clean it with throttle body cleaner
  4. Reinstall the components and reconnect the battery
  5. Start the engine and check for improvement
4
mediumFree under recall
Replace the Engine Control Module (ECM) if it is part of the recall and causing misfire issues.
Source: https://static.nhtsa.gov/odi/rcl/2010/RCDNN-10V384-2969.pdf

Repair Steps:

  1. Contact a Toyota dealer to verify recall eligibility
  2. Schedule an appointment for ECM inspection and replacement
  3. Have the dealer perform the ECM replacement at no cost
  4. Verify the engine performance post-replacement

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