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How to Check the Condition of Fuel Injectors?

1 Answers

AlexandraLynn

07/29/25 3:51pm

Check the Condition of Fuel Injectors?" /> The methods to check the condition of fuel injectors are: 1. On-vehicle inspection; 2. Testing on the engine; 3. Removal and bench testing. The functions of fuel injectors are: 1. Facilitating complete combustion; 2. Delivering fuel to the engine. The working principle of fuel injectors is: When the electromagnetic coil is energized, it generates magnetic force that lifts the needle valve to open the injection nozzle. Fuel is then sprayed at high speed through the annular gap between the needle valve's tip and the nozzle, forming a fine mist. Common fuel injector faults and solutions include: 1. Nozzle clogging: Use chromium oxide paste on a lapping plate for polishing. Replace the needle valve if its cylindrical surface shows significant wear; 2. Poor sealing: Apply chromium oxide or toothpaste to the sealing surface of the needle valve; 3. Piston wear: Replace the piston; 4. Fuel delivery issues: Inspect and repair the fuel supply pump.

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