Do Fuel Injectors Need to Be Replaced as a Set?
2 Answers
The role of fuel injectors: Facilitates complete combustion and delivers fuel to the engine. How fuel injectors work: When the electromagnetic coil is energized, it generates suction, lifting the needle valve to open the injection hole. Fuel is then sprayed at high speed through the annular gap between the needle valve head and the injection hole, forming a mist. Cause: Fuel injector blockage occurs due to carbon deposits in the engine accumulating on the injectors or impurities in the fuel clogging the injector pathways. When a fuel injector is slightly clogged, it can also affect the vehicle's performance.
The fuel injectors in my old car went bad. At first, I only replaced one to save money, but then the others started failing one after another, causing engine shaking and high fuel consumption. After two repairs, I ended up spending even more. Now I've learned my lesson—it's crucial to have fuel injectors of the same age. Mismatched new and old injectors can lead to uneven fuel delivery, causing incomplete combustion and long-term engine damage. If your car has driven over 80,000 kilometers or the injectors show obvious carbon buildup or wear, I recommend replacing the entire set. Adding a cleaning agent during regular car washes helps prevent clogging and makes maintenance much easier. Remember to diagnose which injector is faulty, but for overall performance stability, it's more cost-effective to replace the entire set rather than skimping on the cost.
