What are the causes of engine speed drop?

1 Answers
DiKhloe
07/29/25 6:44pm
Engine speed drop can be caused by the following reasons: 1. Fuel system malfunction: Generally, when the fuel path is blocked, it may cause speed drop. 2. Insufficient engine power: The engine itself lacks sufficient output power, with output power lower than the rated power, resulting in too low speed. It can also be caused by issues with the main pump. 3. Low fuel quality: The use of poor-quality fuel or fuel with high water content in the engine can lead to insufficient engine power, causing speed drop. 4. Intake system malfunction: When there is air leakage or blockage in the intake system, it can cause insufficient air supply to the engine, resulting in incomplete fuel combustion, which manifests as speed drop and black smoke emission. 5. Large solenoid valve gap: Due to an excessively large solenoid valve gap, fuel supply becomes insufficient, leading to engine speed drop.
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