What are the symptoms of fuel injector leakage?
2 Answers
The fuel injector is an electromagnetic valve that controls the formation of fuel spray into the engine by opening and closing, which helps the fuel burn more fully. The symptoms of fuel injector leakage are as follows: 1. The engine idles unevenly; 2. Gasoline dripping into the cylinder will make the mixture too rich, making it difficult to start the engine; 3. The engine noise increases; 4. The throttle response is not sensitive, and acceleration is unstable; 5. Black smoke comes out of the exhaust pipe, and the piston rings wear out faster. The causes of fuel injector leakage are as follows: 1. The contact surface between the injector hole and the needle valve is incomplete under the action of the pressure regulating spring; 2. The pressure spring loses its function, resulting in insufficient closing pressure; 3. Poor filtration of gasoline.
I remember when the fuel injector was leaking, the car would idle particularly rough, feeling as uncomfortable as sitting on a massage chair. Starting the engine also became difficult, requiring several presses on the accelerator to get it going. A strong gasoline smell was noticeable, especially after parking in the garage. Fuel consumption would inexplicably rise, burning an extra two to three liters per hundred kilometers, which also lightened the wallet. In terms of emissions, exhaust smoke might increase, making it easier to fail environmental inspections. More seriously, oil stains could be seen on the ground or in the engine bay. If not addressed promptly, sparks could cause a fire. I once took it to a repair shop and found out it was due to aging seals. Replacing them cost a bit, but early detection is better. It's advisable to regularly check the fuel injector area and develop good habits.
