Methods for cleaning spark plugs: 1. White Vinegar Cleaning Place the spark plugs in a glass container and pour white vinegar over them until fully submerged. For light carbon deposits, soak for 2-3 hours; for severe deposits, soak for 4-5 hours. After soaking, gently scrub with a hard-bristle toothbrush to restore their appearance. Shake off the vinegar and let them air-dry naturally. Do not rinse with water. 2. Carburetor Cleaner Place the spark plugs upside down in a glass bottle and spray carburetor cleaner into the bottle, ensuring it covers the spark plugs without spilling. Close the lid securely—since the cleaner is flammable, fire safety is crucial. After about 30 minutes, remove the spark plugs and scrub them with a toothbrush while spraying more cleaner. Finally, air-dry or use a blow dryer. 3. Blue Toilet Cleaner Soak the spark plug electrodes directly in undiluted toilet cleaner. You will observe bubbles forming due to the chemical reaction with carbon deposits. Leave in a ventilated area for 10 minutes until bubbles diminish. If black deposits remain, soak longer, then rinse with white vinegar (not water) and air-dry. 4. Professional Cleaning at a 4S Shop or Repair Shop This is the simplest method: drive to a 4S shop or repair shop and pay professionals to handle it. However, they often replace rather than clean the spark plugs, so budget accordingly. Among these methods, using carburetor cleaner is the best option. It is specifically designed to tackle oil, grease, and carbon deposits without damaging the spark plugs. Additionally, carburetor cleaner is very affordable. Symptoms of Damaged Spark Plugs: Damaged spark plugs may cause the following issues: difficulty starting the engine, reduced power, excessive exhaust emissions, and increased fuel consumption.
