Why Won't My Car Start with Push Button Start?

What are the speed ranges for gears 1 to 5?

The speed ranges for gears 1 to 5 in a manual transmission car are as follows: 1st gear: 1st gear is the starting gear. When the vehicle is stationary, slowly release the clutch and gently press the accelerator. The speed range should be 0-15 km/h. 2nd gear: After a smooth start, when the RPM reaches between 1600 and 2200, you can shift to 2nd gear. The speed range for 2nd gear is 20-30 km/h. 3rd gear: When the car is around 2200 RPM, you can shift to 3rd gear. The speed range for 3rd gear is 40-50 km/h. 4th gear: When the car is around 2200 RPM, you can shift to 4th gear. The speed range for 4th gear is 50-80 km/h. 5th gear: When the car is around 2200 RPM, you can shift to 5th gear. The speed range for 5th gear is 80-150 km/h. The reason why the car's gear must match the speed is that when the speed corresponds to the gear, the car's performance is at its best, and the thermal efficiency of the fuel is the highest. If the speed and gear do not match, such as high speed with low gear or low speed with high gear, it will not only increase fuel consumption but also cause irreversible damage to the engine and transmission. Therefore, the gear and speed must be matched while driving. When shifting gears, the clutch and accelerator must be well-coordinated. Press the clutch pedal to the floor, then release the accelerator pedal, and quickly shift to the corresponding gear. After shifting, immediately release your hand and do not keep it on the gear lever for too long, as this can easily damage the gear lever. For manual transmission cars, the principle of "accelerate before upshifting, decelerate before downshifting" must be remembered. Before upshifting, "rev" the accelerator to increase the speed first, and before downshifting, "release" the accelerator to reduce the speed first. Before shifting gears, the clutch pedal must be fully depressed, and the gear lever should be operated lightly, quickly, smoothly, and accurately.

8

1

Share

What Causes a Motorcycle Spark Plug to Not Discharge?

Motorcycle spark plugs do not discharge due to a malfunction in the ignition system. Motorcycle spark plug power supply principle: The 15KV voltage on a motorcycle spark plug is generated by a dedicated high-voltage circuit. Inspection methods: Check whether the motorcycle battery has power or if there is voltage but no current output. The motorcycle battery supplies power to the self-excited oscillation circuit for ignition, which converts it into the low-voltage pulse voltage required by the low-voltage coil of the high-voltage coil. If the battery has no power, it cannot generate the low-voltage pulse voltage, preventing the high-voltage coil winding from producing a high-voltage pulse. This results in no voltage on the spark plug, making ignition impossible. Old batteries may show voltage but fail to output current when in use. Solution: Replace with a new battery for testing. If the power supply line from the motorcycle battery to the self-excited oscillation circuit is disconnected or has poor contact, the self-excited oscillation circuit cannot generate the low-voltage pulse voltage required by the low-voltage coil of the high-voltage coil. This prevents the high-voltage coil winding from producing a high-voltage pulse, resulting in no voltage on the spark plug and making ignition impossible. Solution: Carefully check for broken copper traces, cold solder joints, or other circuit disconnection issues. If the transistor or oscillation module in the self-excited oscillation circuit is damaged, or if the inverter capacitor is faulty, no low-voltage pulse will be generated. This prevents the high-voltage coil winding from producing a high-voltage pulse, resulting in no voltage on the spark plug and making ignition impossible. Solution: Remove the transistor and test it with a multimeter to check for damage. Use the multimeter's capacitance setting to measure if the capacitor's capacity has changed. If any part of the self-excited oscillation circuit, its power supply, the low-voltage winding of the high-voltage coil, or the high-voltage winding is disconnected, the high-voltage coil winding cannot produce a high-voltage pulse. This results in no voltage on the spark plug, making ignition impossible. Solution: Carefully inspect the connecting wires and copper traces for breaks, cold solder joints, or other issues.

11

5

Share

What is the principle behind camera-based speed detection?

Most systems use radar to detect vehicle speed. When a vehicle enters the detection range, the radar emits two waves to determine the vehicle's position. After both waves are received, the distance traveled is calculated using trigonometric principles. Dividing this distance by time yields the vehicle's speed. If the calculated speed exceeds the predefined threshold in the system, the camera is immediately triggered to capture an image, making it impossible to hide speeding behavior. Currently, the mainstream international technology combines high-speed cameras with radar. Speed measurement principle: The speed measurement principle is a term from physics, determining whether a vehicle is speeding based on its velocity when passing parallel induction loops, with photographic evidence captured. The drawback of this method is the significant construction effort required to install induction loops in the road. If the road surface is altered, the loops must be reinstalled. Additionally, maintaining these loops is challenging in high-latitude regions during thawing periods, low-latitude regions in summer, and areas with poor road quality. Ultrasonic distance measurement principle: An ultrasonic emitter sends out ultrasonic waves, and the distance is determined based on the time difference when the receiver detects the waves. This principle is similar to radar distance measurement. The ultrasonic emitter sends waves in a specific direction while simultaneously starting a timer. The waves travel through the air and bounce back upon hitting an obstacle. The ultrasonic receiver stops the timer as soon as it detects the reflected waves.

4

0

Share

Can a car that has been idle for three years still be driven?

A car that has been idle for three years can still be driven, but it needs to be inspected and maintained at a repair shop. Things to check before driving: Clean and replace all the interior parts of the vehicle. Perform a comprehensive maintenance on the engine. Conduct a full maintenance on the transmission. Replace all the rubber pads on the chassis. Thoroughly inspect the wiring of the car body. Hazards of long-term parking: Oil seal aging. When a car is parked, the contact force around the oil seal is always uneven, leading to permanent deformation of the oil seal, which can easily cause oil leaks. Oil oxidation corrodes engine parts. If a car is parked for a long time, oil oxidation can become very severe. When starting the engine again, dry or semi-dry friction may occur between the cylinder and piston, accelerating part wear and significantly increasing resistance, making it difficult to start. Battery premature failure. Currently, most cars use lead-acid batteries, which self-discharge once the car is parked. Under normal conditions, the battery's capacity can decrease by more than 1% per day due to self-discharge. More seriously, after long-term self-discharge, sulfide forms on the battery plates, affecting the recharging efficiency and ultimately leading to premature battery failure.

16

1

Share

Can Snow Damage a Car?

Generally not, but if not cleaned in time, it can easily damage the car paint and other auto parts. Clean snow and wash the car promptly: I believe many car owners have the notion that if the car isn't dirty, there's no need to wash it. Snow falling on the car body will naturally melt, so washing isn't necessary. The editor must point out that this idea is wrong. To the naked eye, snow indeed doesn't dirty the car. However, snow contains various corrosive substances like acids and alkalis. If these remain attached to the car's surface for a long time without timely cleaning, they can cause further damage to the car paint. If this continues, the consequences can be very severe. Therefore, after snowfall, it's essential to promptly remove the snow and wash the car as soon as possible. Choose warm water for car washing: Due to the cold weather after snow, using cold water to wash the car not only fails to achieve a cleaning effect but can also cause ice to form on the car's exterior, leading to secondary damage. Water that's too cold shouldn't be used, and similarly, overly hot water is also unsuitable because the cold weather makes the car's temperature too low. If hot water is used for washing, the significant temperature difference between hot and cold can cause substantial damage to the car's surface. For instance, the car's paint may lose its luster or, in severe cases, even become uneven. Therefore, after snow, it's advisable to wash the car with warm water.

11

1

Share

What are the gear positions of the 7th generation Elantra?

The gear positions of the 7th generation Elantra are introduced as follows: P gear: Parking means "parking". It is the parking gear used when the vehicle is parked. When you reach your destination or need to park for a long time, shift the gear lever into this position. Note: The vehicle must be completely stopped before shifting into P gear. Shifting into P gear before the vehicle is completely stopped may cause partial mechanical damage to the automatic transmission. When P gear is engaged, the wheels are mechanically locked, preventing the vehicle from moving forward or backward. Therefore, it is essential to engage P gear when parking on a slope. Additionally, during short stops (such as at traffic lights), it is best not to shift into P gear to avoid severe damage to the entire transmission in case of a rear-end collision. R is the reverse gear, the abbreviation for the full English word "reverse". Whether it's a manual or automatic transmission, R stands for reverse gear. Engaging R gear will make the vehicle move backward. This gear can only be engaged when the vehicle is stationary and the engine is idling. Never use R gear when the vehicle is moving forward, and pay special attention to accelerator control when reversing. N gear: Neutral means "neutral", also known as the neutral gear. At traffic lights, you can shift into this gear and step on the brake. If the waiting time is longer, it is recommended to engage the handbrake directly, allowing your foot to leave the brake pedal for a short rest. Many people mistakenly believe that shifting into N gear while coasting downhill or at high speed can save fuel. This is a serious misconception—not only does it not save fuel, but it can also damage the transmission. S: Sport gear. The difference between D gear and S gear is simply the computer switching to different shifting programs. Therefore, S gear can be switched at any time without causing adverse effects such as damaging the transmission. It is suitable for overtaking but not for high-speed driving. D gear: Drive means "drive" and is the forward gear in a car. Engaging this gear and stepping on the accelerator will make the vehicle move. In this gear, the transmission will automatically shift based on speed and throttle conditions. At traffic lights, you can stay in D gear while stepping on the brake. If the waiting time is short, this is not a problem, but if it is prolonged, it may cause the transmission fluid temperature to rise and the fluid to deteriorate. The 7th generation Elantra is equipped with a 1.5L and a 1.4T engine, paired with a CVT transmission and a 7-speed dry dual-clutch transmission, respectively.

13

5

Share

Why Won't My Car Start with Push Button Start?

What are the speed ranges for gears 1 to 5?

What Causes a Motorcycle Spark Plug to Not Discharge?

What is the principle behind camera-based speed detection?

Can a car that has been idle for three years still be driven?

Can Snow Damage a Car?

What are the gear positions of the 7th generation Elantra?

Where is the interior trunk switch for the BYD Qin located?

How long can a car go without inspection before being scrapped?

Does Snow Cause Significant Damage to Car Paint?

Why Are Used Aston Martins So Cheap?