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