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What Causes Lack of Acceleration After 80 MPH?

1 Answers

DiJasper

09/04/25 3:40am

Using low-quality fuel that results in incomplete combustion in the engine or a clogged fuel system can cause this issue. Below are detailed explanations: 1. Clogged intake system: A dirty air filter in the vehicle's intake system can lead to insufficient oxygen levels in the engine, causing incomplete fuel combustion. Additionally, malfunctioning fuel injectors that result in poor atomization or issues with the ignition system (such as faulty spark plugs or ignition coils) may also contribute to this problem. 2. Check the oxygen sensor: As a critical component of the car's internal control system, the oxygen sensor monitors the air-fuel ratio in the engine. If it fails, the air-fuel ratio will become unbalanced, leading to a sudden increase in fuel consumption. A damaged oxygen sensor may also cause the exhaust pipe to emit darker-colored emissions. In such cases, the oxygen sensor should be replaced.

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