How can I test my signal injector circuit?
How can I test my signal injector circuit? The completed device could be tested by attaching a pair of headphones between the probe terminal and chassis negative clip of the circuit. If everything is good a frequency note of approximately 3kHz will be clearly audible. Why is there no pulse on fuel injector? If still no injector pulse, then the computer is not pulsing the injectors open for some reason and more testing will be needed. 4) Again, you want the Noid light to blink consistently when cranking the engine over. This is a good signal. How to check fuel...