1. Symptoms of the problem
General spark plug problems will cause the engine to run poorly, such as difficulty starting, rough idling, poor acceleration, backfiring when refueling. emergency, excess exhaust gas, increased fuel. Consumption and other abnormal phenomena. If carbon deposits in the engine become more severe, the valves may not be closed tightly, resulting in a certain cylinder stopping completely due to lack of pressure in the cylinder, or even blocking of the valve to prevent it from returning to its original position. At this time, the valve and piston will hinder movement, possibly damaging the engine. We see that the impact of carbon deposits on the engine is very enormous.
2. Solution
1. Be careful when disconnecting the high voltage wire connector and do not shake the insulatione the spark plug forcefully during operation, otherwise the sealing performance of the spark plug will be affected. will be destroyed.
2. The engine can be disassembled once cooled. After loosening the spark plug to be removed, use a thin hose to blow out the dirt around the spark plug one by one to prevent it from falling. in combustion after unscrewing the spark plug inside.
3. The area around the screws, spark plug electrodes and seals must be kept clean, dry and free of oil, otherwise it will cause current leakage, air leakage, spark weakening and other defects.
4. When installing, first use a sleeve to align the spark plug with the screw hole, then gently screw it in by hand until it is about half of the total thread length , then tighten it with a return lever. If the hand is not smooth lWhen twisting, you need to go out and check if the threads are aligned or if there are any impurities contained in the threads. Do not tighten blindly to avoid damaging the screw holes and damaging the cylinder head, especially the aluminum alloy cylinder head. .
5. Tighten to the required torque. If it is too loose, it will cause air leakage. If it is too tight, the gasket will lose its elasticity, which will also cause air leakage. Since the tapered spark plug does not require a seal, it is particularly important to respect the tightening torque.
6. When there is carbon deposit on the spark plug and the oil deposit is not very serious, it can be soaked in gasoline, kerosene or acetone. Once the carbon deposit has softened, use a non-metallic solvent. Brush for cleaning the electrode as well as the ceramic core and shell. Dry the carbon depositsinto the body cavity with compressed air. Do not scrape, polish with sandpaper or burn with gasoline to avoid damage to the electrodes and porcelain insulator. Once cleaning is complete, perform a spark plug gap check.
3. Preventive methods
After completing the above, installed and tested, remind the owner to carry out regular maintenance and keep the oil and gas lines clean, it is recommended to do this every 4 000; -8,000 km (depending on vehicle use and actual conditions) clean the air grille (replace according to actual conditions), clean the accelerator once, clean the burner every 15,000 to 25,000 km (depending on the actual use and conditions of the vehicle); clean intake pipe, throttle valve, combustion chamber and associated oil lines, check fuel compartment and replace sif necessary, avoid idling for long periods, turn off the engine immediately after driving at high speed, drive at high speed immediately after starting; and shift gears at low speeds.