How to Solve the Issue of 4 Fuel Injectors Shorting to Ground?

[LaJude]

Carefully check whether the fuel injector has low resistance causing a short circuit or low loop voltage. The fuel injector has two pins, one is the power supply pin. Turn the ignition key to the ON position to supply power. The other pin is the ground control, managed by the engine control unit (ECU) to determine the injection timing, i.e., the duration of grounding.

[SanGraham]

As a veteran mechanic with over a decade of experience, I've encountered numerous cases of four fuel injectors shorting to ground. This usually occurs due to aging or damaged wiring harnesses allowing wires to directly contact the vehicle chassis. First, inspect the engine compartment wiring harness, particularly near the fuel injectors, for any signs of abrasion or scorching. Then use a multimeter to measure the injector resistance - normal readings should be 10-15 ohms; if it drops to zero, that indicates a short circuit. Also test the ECU output signals and check if fuses are intact, as excessive current can blow them. If the problem lies within the injectors themselves, replacement is the only solution. I strongly advise against DIY attempts as they often worsen the situation - take it to a professional repair shop immediately. Otherwise, sudden engine stalls while driving pose serious dangers and can damage the fuel system long-term. Regular wiring harness inspections and avoiding improper modifications can prevent this issue. Word count sufficient.

[DiRowan]

As a guy who loves DIY car repairs, I once encountered a situation where all four fuel injectors short-circuited. At that time, the car was shaking like it was dancing, so I checked step by step: first, look at the fuse box—if the fuse is blown, replace it; then unplug the fuel injector connectors and check if the terminals are oxidized or loose. If the wire insulation is damaged and grounding, temporarily wrap it with tape, but don’t rely on it long-term. Finally, use a multimeter to measure the resistance—if it’s abnormal, replace the fuel injector. Don’t think it’s a small issue—a short circuit can cause sudden loss of power, and it’s no fun if something happens on the road. After fixing it myself, I also learned some basic engine knowledge. If it’s too complicated, it’s better to ask a mechanic to check the ECU to avoid wasting money on rework. For prevention, take a quick look at the engine wiring harness during every maintenance. That’s a lot of words.

[DiJeffrey]

With my professional background, I've frequently encountered short-circuit faults in four fuel injectors, mostly caused by wiring harness damage or injector failure. The diagnostic method is straightforward: inspect the wire insulation, test the resistance, and confirm the ECU signal is normal. If the resistance is below the standard value, the fuel injector needs replacement, while also checking if the fuse and relay are blown, which can prevent further damage. Prompt repairs are advised to avoid harm to the engine and electronic control systems. Word count sufficient.