No crankshaft signal in an engine may be due to damage to the crankshaft sensor or camshaft sensor. The following are methods for daily engine maintenance: 1. Regularly clean the crankcase: During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. When the amount is small, it remains suspended in the oil; when large, it precipitates, clogging filters and oil passages, making engine lubrication difficult and causing wear. Additionally, oil oxidation at high temperatures can form varnish and carbon deposits that stick to the pistons, increasing fuel consumption and reducing power, and in severe cases, causing piston rings to seize and cylinder scoring. Therefore, regularly use a high-efficiency, fast-acting cleaning agent for the lubrication system to clean the crankcase and maintain engine cleanliness. 2. Regularly remove carbon deposits from the car: Carbon deposits are inevitable during fuel combustion. Excessive carbon deposits can lead to difficulties in starting, unstable idling, poor acceleration, backfiring during rapid acceleration, excessive exhaust emissions, and increased fuel consumption, all of which adversely affect the engine. To prevent carbon buildup, maintain good driving habits such as frequently driving at high speeds, appropriately increasing shift RPMs, avoiding prolonged idling, and using clean gasoline. 3. Regularly replace coolant: Coolant, short for antifreeze coolant, prevents freezing and cracking of the radiator and engine cylinder block or head in cold winter conditions. Many believe coolant is only for winter use, but it should be used year-round. In winter, it prevents freezing, and in summer, it avoids overheating. Original coolant typically needs replacement every 2 years or 60,000-80,000 kilometers, after which annual replacement is recommended. When selecting coolant, choose a product with a freezing point about 10°C lower than the lowest temperature in the vehicle's operating area. Always use the same type when adding coolant; mixing different types is not allowed.
