
The main reasons for the engine's lack of acceleration power include low-quality fuel, severe carbon buildup, and excessively high engine temperature. Below are the causes and solutions: 1. Low-quality fuel added. If the fuel quality is too low, it cannot fully combust in the engine cylinders, resulting in reduced engine power and a feeling of weakness during acceleration. In this case, switch to higher-quality fuel. 2. Severe carbon buildup. Prolonged low-speed driving can lead to carbon buildup, causing blockages in the fuel system and resulting in symptoms of weak acceleration. In this scenario, carbon cleaning is necessary. 3. Excessively high engine temperature. When the car engine is overloaded, the temperature inside the cylinders rises sharply, leading to weakened acceleration capability. In this situation, cooling measures should be applied to the engine.

I've been driving a Reiz for several years and occasionally experience sluggish acceleration. First, check if the air filter is clogged—if it's dirty, the engine can't get enough air, which definitely affects performance. Spark plugs are another key point; if they're worn out and ignition is weak, try replacing them with a new set. If the fuel injector is clogged, fuel delivery becomes inefficient, leading to reduced power. Also, inspect the ignition coils and oxygen sensors, as failure in these components can also hinder performance. Safety first—never push through high speeds if acceleration is weak. Promptly visit a 4S shop or repair center to scan for fault codes. Spending a few hundred bucks can fix the issue. Additionally, regular maintenance can help prevent this problem.


