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What are the reasons for no signal power to the fuel injector?

1 Answers

McAmir

07/30/25 3:41am

The reason for no signal power to the fuel injector may be that the computer cannot determine the working cylinder number. The following are the reasons why the fuel injector does not spray fuel: 1. Insufficient fuel: Generally, when the car's fuel light is on, it can still run for 40-50 kilometers, so many people do not refuel when the fuel light is on. However, if not handled properly, it can lead to a severe shortage of fuel in the tank, causing the fuel injector to stop spraying fuel. 2. Fuel pump damage: Many people do not refuel when the fuel light is on, but the fuel pump relies on fuel for cooling and lubrication. Once the fuel in the tank is severely depleted, the fuel pump is highly likely to be damaged. 3. High-pressure fuel pump failure: To increase the fuel injection pressure and improve the atomization effect of the fuel, the fuel is pressurized a second time by the high-pressure fuel pump before being injected by the fuel injector. Once the high-pressure fuel pump fails, causing a sudden drop in fuel supply pressure, the fuel injection of the injector will be affected. 4. Fuel injector clogging: Due to the unsaturated olefins and gums in the fuel, a coking-like substance, namely carbon deposits, can form under high temperatures. When carbon deposits severely accumulate on the fuel injector, it is highly likely to clog, thereby affecting the fuel injection of the injector.

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