Can I go to another inspection station if my vehicle fails the annual inspection?

What Causes Abnormal Noise During Engine Acceleration?

Acceleration is the operation that most tests the quality of a car, and many car problems will manifest during acceleration, so regular maintenance is essential. The reasons for abnormal noise during engine acceleration are: transmission noise; valve noise; engine noise. The reasons for abnormal noise after a cold start are: belt slipping on the generator: intense friction and vibration between the belt and the pulley produce noise at a certain frequency. Belt slipping may be due to a loose belt, so it's important to have it checked at a repair shop promptly; usually, it's the sound of the valves: after a car has been parked for a long time, the engine oil returns to the bottom, meaning the top of the engine, or the valve chamber, will have less oil. Because the valves lack the sealing and lubrication provided by the oil, you may hear a lot of noise the next morning when starting the car.

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What is the horsepower of the Mazda Axela engine?

The Mazda Axela engine is produced by Nanjing Changan Ford Mazda Engine Co., Ltd., and is a domestically manufactured engine. The 1.5L version of the Mazda Axela engine is model SKYACTIV-G, with a maximum horsepower of 117, maximum power of 86kW, and maximum torque of 148Nm. The 2.0L version is model SKYACTIV-X, with a maximum horsepower of 158, maximum power of 116kW, and maximum torque of 202Nm. For daily maintenance of the Mazda Axela engine, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional devices in the intake and exhaust systems and usage conditions; for diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, with the selection standard not lower than the manufacturer's requirements; Regularly change the oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, performance deteriorates, leading to various engine problems. To avoid malfunctions, change the oil regularly based on usage conditions and maintain an appropriate oil level; When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and oil cannot pass through, it may rupture the filter or open the safety valve, bypassing through the relief valve and carrying contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination; 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. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear; Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.

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What Are the Causes of Intermittent Engine Misfire in a Cylinder?

Engine intermittent misfire in a cylinder can be caused by the following reasons: 1. Clogged or aged fuel injector: As the vehicle ages, carbon deposits accumulate over time, leading to clogged fuel injectors. Fuel injectors that have been subjected to long-term high-pressure gasoline flow may experience severe aging. These conditions can cause delayed solenoid valve switching, excessive fuel injection, and overly rich air-fuel mixture in the engine, resulting in intermittent misfire in a cylinder. 2. Spark plug issues: Spark plugs are one of the most easily damaged components in a car. Any malfunction in the spark plugs can lead to intermittent misfire in a cylinder. 3. Damaged ignition coil and cylinder wire: If these components malfunction, the spark plug cannot ignite properly, leading to misfire in a cylinder.

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Is Replacing the Crankshaft Considered an Engine Overhaul?

Replacing the crankshaft is considered an engine overhaul. Below are relevant details about engine overhauls: Introduction: A major engine overhaul for automobiles primarily includes replacing components such as valves, pistons, cylinder liners, or performing cylinder boring and crankshaft grinding. According to the standards of most 4S shops, it generally requires replacing four sets of components: pistons, piston rings, valves, valve oil seals, valve guides, crankshaft bearings, and connecting rod bearings. Maintenance Notes: Remove sludge from the throttle body. The formation of sludge in the throttle body can be attributed to various factors, including carbon deposits from exhaust gases of fuel combustion accumulating in the throttle body, as well as residues from impurities not filtered by the air cleaner. Excessive sludge can cause air intake resistance, leading to increased fuel consumption. Clean carbon deposits from the fuel injectors. Carbon deposits easily form in the combustion chamber, which can result in difficulty starting the engine. Carbon deposits in the fuel injectors can also lead to clogged fuel passages, distorted fuel injection, poor atomization, and naturally increased fuel consumption.

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How to Determine if a Small Amount of Water Has Entered the Engine Intake?

Here are methods to determine if water has entered the engine: Check the engine oil condition: Normal engine oil colors include light yellow, brown, or transparent colorless, but it generally should not appear milky white. Use the dipstick to check for any milky white oil-water mixture. If present, it indicates water has entered the engine. Inspect the air filter: Check the air filter and the lower housing for obvious signs of water ingress. Examine the intake pipe and intake manifold for clear traces of water passing through. White smoke from the exhaust pipe: When there is water in the engine fuel or combustion chamber, the water is heated by the combustion heat in the cylinder, turning into steam that exits through the exhaust pipe, forming white smoke. If white smoke appears after the vehicle has driven through water, it is highly likely that water has entered the engine.

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Will a small amount of water entering the engine have any impact?

Even a small amount of water entering the engine can have adverse effects, and severe water ingress may even lead to engine failure. When a vehicle drives through water, water can enter the cylinders through the intake manifold. Due to the incompressibility of water, the piston stroke will shorten, potentially causing the engine connecting rods to bend or break. In extreme cases, broken connecting rods may puncture the engine block. If water enters the engine, immediately contact a repair shop for inspection and replace components as necessary. Precautions for driving in rainy weather include: Avoid driving through deep water: If the water depth exceeds 20 cm, do not attempt to drive through it. After driving through water, multiple components may be affected, potentially leading to vehicle malfunction. Check the braking system for water ingress: Due to the strong absorption capacity of the braking system, rainwater can easily enter the brake fluid, affecting braking performance. Severe cases may result in brake failure. It is recommended to have the vehicle inspected at a professional repair shop after heavy rain.

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Can I go to another inspection station if my vehicle fails the annual inspection?

What Causes Abnormal Noise During Engine Acceleration?

What is the horsepower of the Mazda Axela engine?

What Are the Causes of Intermittent Engine Misfire in a Cylinder?

Is Replacing the Crankshaft Considered an Engine Overhaul?

How to Determine if a Small Amount of Water Has Entered the Engine Intake?

Will a small amount of water entering the engine have any impact?

Is Replacing Connecting Rods Considered a Major Engine Overhaul?

What is the difference between a red light and a yellow light on the engine?

What does the number of cylinders in an engine mean?

What are the possible causes of engine acceleration weakness?