What causes engine weakness?

[VanAmir]

Engine weakness can be attributed to the following reasons: 1. Severe carbon deposits in the engine: Excessive carbon buildup can cause the fuel injected by the cold start injector to be largely absorbed by the carbon deposits, resulting in insufficient fuel entering the cylinders and causing the engine to shake and lose power. When there is too much carbon buildup inside the engine, the car's ignition energy decreases, and the intake efficiency drops, ultimately leading to reduced engine power. 2. Increased electrode gap in the spark plug: A larger electrode gap can affect the spark plug's ignition energy, causing it to decrease. Reduced ignition energy can result in incomplete combustion of the combustible mixture in the engine, which in turn affects the engine's performance, leading to decreased power and increased fuel consumption.