What is the reason for the high idle speed of diesel vehicles?

There are many reasons for the high idle speed of diesel vehicles: 1. There is too much carbon in the engine. 2. Engine throttle assembly failure. 3. Fuel pump and oil system of the vehicle. 4. Clutch plates of manual transmission models slip or are damaged. If the idle speed of the diesel engine is too high, you can clean the throttle of the vehicle. If the throttle fails, the throttle opening will suddenly become larger, resulting in excessive idle speed of the vehicle. It may be that the fuel pump and fusion system are out of order, and the fuel injector is dripping or blocked, which leads to poor operation and unstable idle speed of individual cylinders.

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