What Causes a Fuel-Injected Motorcycle to Not Spray Fuel?
1 Answers
If the fuel injector of a fuel-injected motorcycle does not spray fuel but can spray fuel when directly connected to a 12V power supply, the issue might still be related to the fuel injector. Check if there is a fault in the injector coil. When directly connected to a 12V power supply, the higher voltage might allow the injector to work, indicating that the injector is not completely damaged. Other possible causes include faults in related sensors or the ECU, loose or poor connections in the wiring or plugs, excessive resistance, or insufficient voltage. Additionally, inspect the fuel pump motor for issues, and check for blockages in the fuel lines or fuel filter. The reason for a clogged fuel injector is often due to carbon deposits in the engine accumulating on the injector or impurities in the fuel blocking the injector's pathways. The formation of deposits is directly related to the fuel: first, gasoline itself contains colloids and impurities, or dust and impurities introduced during storage and transportation, which accumulate over time in the fuel tank and fuel lines, forming sludge-like deposits. Second, unstable components in gasoline can react at certain temperatures, forming sticky colloids and resin-like substances. These sticky substances, when deposited on the injector or intake valves, harden into carbon deposits during combustion. A fuel injector is essentially a normally closed valve, meaning it remains closed when no control signal is input. In contrast, a normally open valve remains open when no control signal is input. Fuel injectors can be categorized into voltage-driven and current-driven types based on how the solenoid coil is controlled.
