What are the reasons for loud noise when stepping on the car accelerator?

Should the Haval H6 with turbo use 92 or 95 octane gasoline?

According to the official vehicle manual recommendation, the Haval H6 should use 92 octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, the Haval H6 can also refer to the label on the fuel tank cap. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with a compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the compression ratio alone cannot determine the gasoline grade, as high-compression engines can also be tuned to use lower-octane gasoline. Factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Haval H6 occasionally uses the wrong gasoline grade, simply switch back to the correct grade after refueling. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower-octane gasoline, using higher-octane gasoline will not cause damage, but the increased octane number may alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles recommended to use higher-octane gasoline, using lower-octane gasoline can cause engine knocking. Due to the significantly lower octane number, the fuel may ignite prematurely during the compression stroke, creating resistance before the spark plug fires. This resistance makes the engine run very unstably. Mild knocking may only increase noise without noticeable engine damage, but severe knocking indicates serious engine issues, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring.

19

4

Share

How to Repair a Broken Car Bumper?

Car bumpers are mostly made of polypropylene plastic and are primarily located at the front (front bumper) and rear (rear bumper) of the vehicle. The repair methods for a broken bumper are as follows: 1. First, open the hood and observe how to remove the bumper. The removal method can vary depending on the car model, so it's advisable to look it up. 2. Align the cracks on the bumper and secure them with transparent tape to prevent deformation of both sides during the repair process. 3. Plug in the prepared soldering iron and flip the bumper over to inspect the cracks on the inside. Wait for the soldering iron to heat up, then use it to melt and fix the internal cracks of the bumper. Operate along the direction of the cracks. 4. Use a plastic welding gun (hot air gun) to weld along the cracks with the prepared welding rod. Remove the transparent tape used earlier and also use the soldering iron to trace along the cracks. 5. Next, use coarse sandpaper to smooth the areas treated with the soldering iron and those that need repainting. Once smoothed, apply putty and let it dry. Then, use wet sandpaper, starting with coarse grit and finishing with fine grit for a smooth surface. Rinse with water, dry with a clean cloth, and wait for it to dry completely before painting. 6. Before spraying paint, shake the spray paint well. Maintain a distance of about 20 cm from the surface, avoiding direct spraying. Maintain a slight angle and allow about 15 minutes between each coat, applying 5-6 layers in total. After the color paint, apply a clear coat to enhance the gloss of the vehicle's paint. If not done properly, the finish may lack shine, develop wavy lines, horizontal streaks, or bubbles. Let it dry for a few hours before reinstalling the bumper front panel. This will effectively repair the cracks.

3

4

Share

What are the reasons for the ABS warning light to illuminate in the Roewe 550?

ABS warning light can illuminate in various states, with different causes and solutions for each state, as detailed below: State 1: ABS warning light stays on constantly (most common). Cause 1: The ABS wheel speed sensor's sensing area is covered by dirt, mud, or other contaminants, affecting the sensor's ability to detect the corresponding speed signal. This prevents the ABS control module from determining the vehicle speed and calculating the wheel slip rate, thus failing to issue appropriate commands to regulate braking. Solution: Clean the dirt from the wheel speed sensor and adjust the gap between the sensor and the signal ring to restore normal function. Cause 2: Poor signal transmission due to loose connections in the system wiring or poor contact in the ABS relay, leading to system failure. Solution: Inspect the wiring connections and reconnect any loose parts. State 2: ABS warning light intermittently illuminates but turns off during acceleration. Cause: When multiple vehicle electrical devices are in use, the battery voltage drops below 10.5V. As the engine speed increases and voltage rises, the ABS warning light turns off. This can also occur if the ABS system's power supply voltage is too low, such as due to poor terminal contact or grounding issues. Solution: Check the battery's specific gravity; inspect the charging system; examine the power supply (e.g., voltage relay or poor power contact). State 3: ABS warning light stays on after engine start and only turns off when the engine is turned off (IGFF). Cause: Poor grounding contact in the ABS hydraulic valve body; poor contact in the ABS hydraulic valve body wiring connector; ABS control module failure. Solution: Loosen and retighten the grounding screw of the hydraulic valve body, cleaning the contact surface if necessary; check if the connector gap has widened; replace the ABS or ABS/ASR control module. State 4: ABS warning light illuminates during high-speed driving. Cause: During high-speed driving, the ABS control module detects a significant discrepancy between the rear and front wheel speed signals; incorrect tire or wheel rim specifications. Solution: Refer to the vehicle's tire and wheel rim specifications, as indicated on the label near the fuel tank cap. State 5: ABS warning light intermittently illuminates. Cause: Improper adjustment of the brake light switch; poor internal contact in the brake light. Solution: With the engine running, press the brake pedal, push the brake switch linkage down fully with a finger, then release the brake pedal to complete self-setting; replace the brake light switch if necessary. If the ABS warning light is illuminated, it is advisable not to continue driving. An illuminated ABS light indicates a malfunction in the vehicle's anti-lock braking system. During emergency braking, if the wheels lock up, the vehicle may skid uncontrollably, preventing the driver from slowing down or adjusting the vehicle's trajectory, posing significant safety risks.

16

0

Share

What is the range of the Magotan New Energy in kilometers?

The Magotan New Energy has a range of 56 kilometers and uses a 6-speed dual-clutch transmission. The dual-clutch transmission offers fast gear shifting and high transmission efficiency, making it well-suited for use with small-displacement turbocharged engines. The Magotan New Energy is equipped with a 1.4-liter turbocharged engine featuring direct fuel injection technology and an aluminum alloy cylinder head and block. The 1.4-liter turbocharged engine delivers a maximum power of 110 kW and a maximum torque of 250 Nm. The electric motor paired with this engine provides a maximum power of 85 kW and a maximum torque of 330 Nm.

16

1

Share

What does the black badge Audi mean?

Black badge Audi refers to the new vehicle type with modified Audi logo. Here are detailed introductions about Audi: 1. Overview: A German luxury car brand with four interlocking rings as its logo. Audi is one of Germany's oldest automobile manufacturers. Currently a subsidiary of Volkswagen Group, headquartered in Ingolstadt, Germany. 2. Models: Main models include Audi A1, Audi A3, Audi A4, Audi A5, Audi A6, Audi A7, Audi A8, Audi Q1, Audi Q2, Audi Q3, Audi Q5, Audi Q7, Audi Q8, Audi TT, Audi R8, and S/RS performance series.

12

0

Share

Is purchase tax required for a 150cc motorcycle?

Currently, 150cc motorcycles are exempt from purchase tax. As long as the motorcycle is registered after July 2019 and has an engine displacement of 150cc or below, no purchase tax is required, whether it's a new or used motorcycle. Relevant information about vehicle purchase tax is as follows: 1. Introduction: Vehicle purchase tax is a tax levied on units and individuals purchasing specified vehicles within the country, evolving from the vehicle purchase surcharge. 2. Tax payment location: For taxable vehicles requiring registration, the tax should be declared and paid to the competent national tax authority at the vehicle registration location; for taxable vehicles not requiring registration, the tax should be declared and paid to the competent national tax authority at the taxpayer's location.

16

1

Share

What are the reasons for loud noise when stepping on the car accelerator?

Should the Haval H6 with turbo use 92 or 95 octane gasoline?

How to Repair a Broken Car Bumper?

What are the reasons for the ABS warning light to illuminate in the Roewe 550?

What is the range of the Magotan New Energy in kilometers?

What does the black badge Audi mean?

Is purchase tax required for a 150cc motorcycle?

Why Can't I Press the Brake and Start the Car?

Why does the Accord use halogen for high beams?

How to Measure Ignition Coil Testing?

Does pouring a three-way catalytic cleaner into the fuel tank work?