What Causes a Gasoline Engine to Lack Power?

1 Answers
VonCourtney
07/29/25 5:29pm
The reasons for a gasoline engine lacking power are as follows: 1. Insufficient fuel supply: The return fuel control valve in the pump cover oil passage is not tightly closed, causing the engine to operate unstably. In severe cases, it may stall under slight load and be difficult to start. 2. Fuel leakage: There is a fuel leak in the fuel line, allowing air to enter or the fuel filter to become clogged, resulting in poor fuel flow and weak engine performance. 3. Fuel outlet valve issues: The fuel outlet valve is not tightly closed; the fuel outlet valve spring is broken, etc., leading to reduced fuel supply and a weak engine. 4. Plunger pair wear: Worn plunger pairs result in insufficient fuel supply, often accompanied by difficulty starting and unstable operation at low throttle. Additionally, sluggish movement of the plunger or roller body, or weak plunger spring tension, can also affect fuel supply, causing the engine to lack power.
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