FAQs

ADAS Service

EV Service

Tire Service

Auto Scanner

About EV

About Maintenance

• 451.

  Can a leaking injector cause high idle?

  Yes, a leaking injector can potentially cause a high idle in a vehicle. Here's how:
  ① Excess fuel: Even when the engine is idling, a leaking fuel injector may cause excess fuel to enter the combustion chamber. This can cause the air-fuel mixture to be richer than intended by the engine control unit (ECU), causing the engine to idle at a higher RPM (revolutions per minute) than normal.
  ② Incomplete combustion: If a leaking injector delivers more fuel than required, incomplete combustion may result. Incomplete combustion can cause erratic engine behavior, including high idle speeds.
  ③ Engine control module compensation: In some cases, the engine control module (ECM) or ECU may attempt to compensate for lean or rich conditions caused by injector leaks by adjusting idle speed. This adjustment can manifest itself as a high idle speed.
  ④ Vacuum leakage: Fuel leakage in the injector can also cause vacuum leakage in the intake system. Vacuum leaks can affect the air-fuel mixture and cause a higher idle speed.
  It's worth noting that high idle speed can be caused by a variety of factors, with injector leaks being just one potential cause. Other issues, such as a faulty idle air control valve, vacuum leak, or throttle body problem, can also cause a high idle condition. If you suspect a leaking injector is causing the high idle speed, it is recommended that the vehicle be inspected by a qualified mechanic. They can perform diagnostic tests, such as a fuel system inspection, to determine the specific cause of the problem and resolve it accordingly.
  
• 452.

  What causes injector seals to leak?

  Injector seals can leak for a variety of reasons. Here are some common reasons:
  ① Wear: Over time, injector seals may degrade due to normal wear and tear. Continuous exposure to heat, pressure and fuel can cause rubber seals to become brittle and lose their elasticity, causing leaks.
  ② High mileage: High-mileage vehicles are more likely to have injector seal leaks. Long-term use of fuel injectors will cause the seals to deteriorate.
  ③ Contaminants: Contaminants in the fuel system, such as dirt, debris or impurities, may damage the injector seals. Clean and high-quality fuel is critical to preventing seal damage.
  ④ Improper installation: Improper installation during injector replacement or maintenance may cause the seal to become misaligned or damaged, resulting in leakage.
  ⑤ Fuel quality: Low-quality fuel or fuel-containing additives incompatible with the injector seals can cause them to degrade.
  ⑥ Extreme temperatures: Exposure to extreme temperatures (both high and low) can affect the integrity of the injector seal. Rapid temperature changes can cause seals to expand and contract, leading to wear.
  ⑦ Aging: As a vehicle ages, its various components, including injector seals, may naturally degrade. Regular maintenance can help identify and address issues before they lead to leaks.
  If you suspect a leaking injector seal, the problem must be addressed immediately to prevent fuel leaks, poor engine performance, and potential damage to other engine components. Regular maintenance and using high-quality fuel can help extend the life of your injector seals.
  
• 453.

  Why does my transmission slip after fluid change?

  Transmission slipping after a fluid change can be caused by several factors. Here are some potential reasons:
  ① Incorrect fluid type: Using the wrong type of transmission fluid may cause slipping. It is critical to use the fluids specified in your vehicle's owner's manual. Different transmissions require specific types of fluids, and using the wrong fluid can affect performance.
  ② Incorrect fluid level: Excessive or insufficient fluid level in the transmission will affect its ability to operate normally. Make sure to follow the manufacturer's guidelines for checking and maintaining correct fluid levels.
  ③ Air in the transmission system: If air is trapped in the transmission oil during the oil change, it may cause unstable shifting and slippage. It is critical to properly vent the system and remove any air bubbles.
  ④ Fluid Contamination: If the new transmission fluid becomes contaminated with debris or old fluid during the change, it can affect the fluid's properties and lead to slipping. Ensure that the transmission system is clean, and use a clean funnel and containers for the new fluid.
  ⑤ Worn clutch parts: If your vehicle is equipped with a manual transmission, slipping may occur if the clutch parts are worn or damaged. In an automatic transmission, worn clutch plates or belts can cause slippage.
  
  ⑥ Mechanical problems: Transmission slipping may also be caused by mechanical problems within the transmission, such as torque converter, solenoid valve or valve body failure. These problems may occur simultaneously with fluid changes but may not be directly related to them.
  
• 454.

  How do you fix an overfilled transmission?

  Fixing an overfilled transmission requires removing the excess transmission fluid and bringing it back to the correct level. Here are some general suggestions on how to resolve a transmission overflow:

  ① Safety First:

  - Ensure your vehicle is on a level surface.
  - Engage the parking brake.
  

  - Use jack stands if you need to lift the vehicle.

  
  

  ② Locate the Transmission Pan:
  

  - The transmission pan is typically located on the bottom of the transmission. It may have a drain plug or bolts securing it.

  
  

  ③ Gather Necessary Tools:
  - You may need a socket wrench or a specific tool to remove the transmission pan bolts or drain plug.
  

  - Have a drain pan ready to collect the excess fluid.

  
  

  ④ Drain the Fluid:
  - Position the drain pan underneath the transmission pan.
  

  - Loosen the bolts or remove the drain plug from the transmission pan, allowing the excess fluid to drain.

  
  

  ⑤ Monitor Fluid Level:
  - Keep an eye on the fluid draining into the pan.
  

  - Periodically check the transmission fluid level using the dipstick to determine when you've removed enough fluid.

  
  

  ⑥ Close the Drain Plug or Bolts:
  

  - Once you've drained enough fluid to reach the proper level, tighten the drain plug or bolts securely.

  
  

  ⑦ Check Fluid Level Again:
  - With the engine running, check the transmission fluid level using the dipstick.
  

  - Add small amounts of fluid if needed to reach the correct level.

  
  

  ⑧ Dispose of Excess Fluid:
  

  - Dispose of excess transmission fluid properly, following local regulations.

  
  

  ⑨ Test Drive:
  - Take your vehicle for a short test drive to ensure that the transmission shifts smoothly.
  Always refer to your vehicle's manual for specific instructions and specifications regarding transmission fluid levels and draining procedures. If you're not comfortable performing these steps or are unsure about your vehicle's requirements, it's recommended to seek the assistance of a professional mechanic.
  
• 455.

  How do I know if I added too much transmission fluid?

  Adding too much transmission fluid can adversely affect your vehicle's transmission. Here are some signs that you may have added too much transmission fluid:
  ① Foaming: Overfilling the transmission can cause the fluid to foam, reducing its ability to effectively lubricate and cool transmission components. Foam may be visible on the dipstick or through the fill tube.
  ② Leakage: Too high a fluid level will cause the gearbox seal to fail, leading to leakage. If you notice spots of red or brown fluid under your car, this could be a sign of overfilling your transmission fluid.
  ③ Gear slippage: Overfilling may cause aeration or bubbles in the fluid, thus affecting its hydraulic properties. When the transmission struggles to engage properly, this can lead to erratic or slippery shifts.
  ④ Overheating: Excessive fluid can cause increased friction and heat in the gearbox. Over time, this can lead to overheating issues and possible damage to internal components.
  ⑤ Difficulty in shifting: Overfilling of transmission oil may interfere with the normal operation of the transmission and cause difficulty in shifting.