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What Causes the Slow Acceleration of Kia Sportage?

2 Answers

Catalina

07/29/25 7:37am

The reason for the slow acceleration of Kia Sportage is that when the power is constant, as speed increases, the traction force decreases, resulting in reduced acceleration and slower speed increase. Below are relevant explanations: 1. Gentle Throttle Application at Start: When starting an automatic transmission vehicle, avoid slamming the accelerator pedal. This only increases the engine RPM, leading to loud engine noise and transmission wear, as well as fuel wastage. Instead, apply the throttle gently to allow the engine RPM to rise evenly. After the speed increases, slightly release the accelerator pedal before pressing it again. This method actually results in faster speed increase and smoother acceleration. 2. Precautions: While driving, try to avoid rapidly pressing the accelerator pedal to the floor. Doing so triggers the automatic transmission's "forced downshift" control, causing the transmission to immediately shift to a lower gear. This can easily lead to excessively high engine RPM, increasing wear on the transmission's friction plates and causing the transmission fluid temperature to rise too high.

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GiaAnn

08/12/25 10:54am

My Kia Sportage has been feeling sluggish during acceleration lately, with a delayed response when I step on the gas pedal, which is quite annoying during daily driving. Personally, I think the issue might be related to the fuel system, such as a clogged fuel filter or excessive carbon buildup in the fuel injectors, leading to poor fuel delivery. Worn-out spark plugs could also degrade ignition performance and slow down acceleration. Last time I checked the trouble codes, it indicated a slight issue with the oxygen sensor, which might be affecting the air intake. The problem becomes more noticeable when using the AC or overtaking, so it's important to get it checked promptly to avoid increased fuel consumption and potential safety risks. I suggest trying a new filter first, and if that doesn't help, take it to a professional shop for a thorough inspection of the wiring and sensors to prevent damage to the transmission.

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