What Causes the Impact Sound When Accelerating or Decelerating the Transmission?

1 Answers
ODavid
07/29/25 4:09pm
Transmission accelerating or decelerating with an impact sound may be due to a clogged fuel line. Automatic start-stop systems paired with dual-clutch transmissions inherently have this issue. Abnormal ignition can also be a cause. Clogged Fuel Line: Clean the fuel line, fuel injectors, fuel lines, and fuel pipes. Adding fuel cleaner directly to the fuel tank is the simplest method, but the effect is not long-lasting, and the cleaning is not thorough. This method is suitable for vehicles with low mileage. Use the "drip bottle" method for cleaning. This can simultaneously clean carbon deposits and sediments from the fuel line and valves, and is commonly recommended by auto repair shops. Abnormal Ignition: Replace spark plugs or the ignition coil. Promptly charge or replace the battery to avoid insufficient power. Use engine oil suitable for the current temperature conditions. Increase the frequency of vehicle use to expel accumulated water in the exhaust pipe with strong exhaust force. Add antifreeze. Regularly clean carbon deposits from the valves. Remove dirt from the spark plugs.
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