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What are the symptoms of fuel injector dripping?

1 Answers

DiPenelope

07/30/25 5:17am

Symptoms of fuel injector dripping include: 1. Difficulty in starting when the engine is hot; 2. Engine shaking. The fuel injector is located on the intake manifold or the cylinder body for direct injection. Its working principle is: when the electromagnetic coil is energized, it generates suction, lifting the needle valve to open the injection hole. Fuel is sprayed at high speed through the annular gap between the needle valve head and the injection hole, forming a mist for better combustion. Common faults and solutions for fuel injectors: 1. Clogged injection hole: Grind with chromium oxide on a flat plate. If the cylindrical surface of the needle valve is severely worn, replace it in time; 2. Poor sealing: Apply chromium oxide or toothpaste on the sealing band at the end of the needle valve; 3. Piston wear: Replace the piston.

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