Ford Crown Victoria weak fuel injector connection signal detected during testing on Ford Crown Victoria

Some Ford Crown Victoria owners report experiencing issues related to weak fuel injector signals, which may indicate potential problems with the fuel system. A weak or absent signal from the Engine Control Module (ECM) can be detected using an oscilloscope, but if the signal is not a square wave matching the engine RPM, it may suggest electrical issues. Additionally, owners of specific models, such as the 1999-2000 4.6L, have reported problems stemming from broken locking tabs on the fuel injector connectors. These electrical problems can lead to excess fuel entering the combustion chamber, resulting in a strong fuel odor. To troubleshoot weak signals, visual inspections and electrical tests are recommended, including checking for damaged wiring and testing voltage at the injector connector. Some owners have found that cleaning clogged fuel injectors, either with a fuel injector cleaner or through ultrasonic cleaning, can help resolve these signal issues. Addressing these concerns is crucial for maintaining proper engine performance and fuel efficiency.