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• 446.

  Why do transmissions fail after flush?

  While transmission fluid flushes are generally beneficial for maintaining a healthy transmission, there are instances where problems may arise after a flush. Here are some reasons why transmissions may fail or experience issues after a flush:
  ①  In some cases, a transmission may already have internal damage or wear before the flush. Changing the fluid may expose these underlying issues, making it seem like the flush caused the problem when, in reality, it was pre-existing.
  ② Incorrect fluid type: Using the wrong type of transmission fluid during flushing can cause compatibility issues and damage transmission components. It is critical to use the fluid specified by the vehicle manufacturer.
  ③ Incomplete flushing: If flushing is incorrect and some old liquid is left behind, it may cause the old and new liquids to mix and not work together well. This can cause lubrication and cooling problems.
  ④ Contaminant release: In some cases, flushing can remove accumulated sludge and contaminants in the transmission. If these particles are not properly removed during the flushing process, they can circulate and cause damage to internal components.
  ⑤ Improper Procedure: Performing a transmission flush requires following correct procedures, including using the correct equipment. If not flushed properly, air bubbles may be introduced into the system, causing problems such as poor shifting or overheating.
  ⑥ High-mileage vehicles: In some cases, components of very high-mileage vehicles may be worn to the point where sudden changes in fluid properties (such as flushing) may cause problems.
  
• 447.

  What is gearbox fluid exchange?

  A gearbox fluid exchange, also known as a transmission fluid exchange, is a maintenance procedure performed on a vehicle's transmission system. The transmission fluid plays a crucial role in lubricating and cooling the various components of the transmission, ensuring smooth operation and preventing excessive wear.
• 448.

  Can all 4 injectors go bad at once?

  While it's uncommon for all four injectors to fail at the same time, it's not impossible. Injectors can fail for a variety of reasons, but the likelihood of all four injectors failing at the same time is generally low.
• 449.

  What happens when one injector fails?

  When a single injector fails, it can have a variety of effects on the engine and overall vehicle performance. Here are some potential effects of injector failure:
  ① Misfire: A faulty injector may not be able to deliver the appropriate amount of fuel to the corresponding cylinder, resulting in misfire. This can lead to a rough idle, poor acceleration, and overall reduced engine performance.
  ② Poor fuel economy: Injector failure will destroy the air-fuel mixture, causing the engine to run too rich or too lean. Running too rich or too lean can result in reduced fuel efficiency because the engine is not operating at its optimal fuel-to-air ratio.
  ③ Excessive emissions: A faulty injector may cause increased emissions because the engine may not be able to burn fuel efficiently. This can cause pollutants to be released into the atmosphere, potentially causing the vehicle to fail emissions tests.
  ④ Engine overheating: In some cases, injector failure may cause incomplete combustion, causing unburned fuel to enter the exhaust system. This raises exhaust temperatures, potentially causing overheating issues and damaging components such as the catalytic converter.
  ⑤ Check engine light: A malfunctioning injector may trigger the vehicle's on-board diagnostic system, causing the check engine light on the dashboard to illuminate.
  ⑥ Engine damage: If a failed injector continues to inject too much fuel, it may wash away the cylinder walls and remove lubricating oil. This can lead to increased friction and wear on engine components.
  ⑦ Catalytic converter damage: Over time, unburned fuel entering the exhaust system can damage the catalytic converter. Catalytic converters are designed to handle specific levels of pollutants, and too much unburned fuel can exceed their capacity.
  
• 450.

  Can a leaking injector cause backfire?

  Yes, a leaking fuel injector can potentially contribute to engine backfires. Here's how:
  ① Rich air-fuel mixture: A leaking injector may introduce additional fuel into the combustion chamber, causing a richer air-fuel mixture than intended by the engine control unit (ECU). When the air-fuel mixture is too rich, incomplete combustion results.
  ② Incomplete combustion: A mixture that is too rich will cause incomplete combustion of the fuel in the combustion chamber. When unburned fuel-air mixture enters the exhaust system and encounters hot components, such as a catalytic converter, it can self-ignite, causing backfire.
  ③ Ignition of unburned fuel in the exhaust: If there is unburned fuel in the exhaust system due to incomplete combustion, the heat in the exhaust gas or sparks generated by hot parts will ignite the fuel, causing backfire.
  ④ Exhaust system damage: Backfire may damage the exhaust system, including the catalytic converter. The sudden ignition of unburned fuel creates high temperatures and pressures that can cause components to fail or rupture.