1. The climate is cold. When the temperature drops below 0°C, starting a diesel engine becomes challenging even if all components are in good condition. In such conditions, it's essential to preheat the engine before attempting to start it. This helps warm up the engine oil and ensures smoother ignition, especially in freezing weather.
2. Timing of fuel supply is crucial. If the fuel injection timing is too late during a cold start, the diesel fuel may mix with air and exit as a milky white substance, making it difficult for the engine to start. On the other hand, if the fuel is supplied too early, the engine might misfire or backfire when cold, but it may not start at all when hot. Proper adjustment of the fuel injection timing is key to smooth operation in different temperature conditions.
3. Excessive valve clearance can lead to poor decompression, which makes the engine harder to turn over. This results in difficulty reaching the necessary cranking speed for a successful start. Regular maintenance and proper adjustment of the valve clearance are important to ensure smooth and reliable engine starts, especially in cold environments.
4. Worn-out plunger parts in the fuel injection pump can cause irregular performance. When the engine is running at low speeds, it may feel unstable, but it runs smoothly at higher speeds without emitting smoke. This is a clear sign that the plunger assembly is worn and needs replacement. Replacing the faulty plunger is the most effective solution to restore proper fuel delivery and engine performance.
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