Why does the car respond slowly after stepping on the accelerator?

2 Answers
DelRonan
08/30/25 5:09am
Reasons for slow throttle response in cars are as follows: 1. Using low-quality gasoline leads to incomplete combustion. Many car owners, in order to save money, refuel at informal gas stations where gasoline contains more impurities. This results in lower fuel calorific value and reduced thermal efficiency, causing sluggish throttle response. Over time, it can also lead to carbon buildup, damaging the engine and reducing its lifespan. 2. Poor or inaccurate ignition in the ignition system causes unstable voltage output, leading to inconsistent ignition. The most common issue is with the spark plugs, such as severe carbon buildup, insufficient ignition voltage, or reaching the end of their lifespan. Depending on the situation, the spark plugs can be cleaned or replaced. 3. Blockage in the intake system increases the engine's intake resistance, reduces air content, and leads to incomplete fuel combustion, naturally decreasing power and causing sluggish throttle response. Cleaning the throttle body can resolve this issue. 4. Clogged fuel injectors or damaged injectors result in poor fuel injection and deteriorated atomization effects.
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Debra
09/12/25 2:20am
Sometimes my car responds as slow as a snail when I step on the gas pedal. I think there are usually several reasons for this. First, check the air filter. If it's clogged with dust, the engine can't get enough air, and the power will be weak. Spark plugs are also a big issue. If they're worn or dirty, the ignition efficiency drops, and acceleration can't keep up. I once changed the spark plugs myself, and the process was quite simple—just find a video online and follow along. It could also be that the throttle body is dirty, with too much carbon buildup causing poor airflow. A simple spray with cleaner can improve this. Additionally, if the fuel pump isn't performing well or the fuel injectors are clogged, insufficient fuel supply will naturally lead to sluggish acceleration. If this problem isn't addressed in time, fuel consumption can skyrocket and even damage the engine. So, it's important to regularly check these components and not wait until you need a tow truck to regret it.
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