Voltage Controlled Injector Waveform Pattern - 1987 Ford LTD Crown Victoria

This document is a single page from a Mitchell Repair Information "Waveforms - Injector Pattern Tutorial." It presents Fig. 2, "Identifying Voltage Controlled Type Injector Pattern," captured on a 1987 Ford LTD Crown Victoria. The page consists of an oscilloscope screen capture set to 10 volts per division (Ch1) with a 1 ms per division timebase. The waveform trace is annotated with five callout letters: A marks the flat supply-voltage level before injector activation; B marks the sharp voltage drop as the injector driver grounds the circuit; C marks the low on-time (grounded) portion of the trace; D marks the tall inductive voltage spike produced when the driver releases the circuit; and E marks the decaying shoulder as the voltage settles back to supply level. A trigger marker (T) sits on the spike and a channel 1 ground reference marker appears at the left edge. The page footer shows it was printed Friday, February 13, 2004 at 12:11 PM, is Page 1, and is copyright 2003 Mitchell Repair Information Company, LLC. A reference number, 95B23862, appears below the scope image. The page teaches readers what a voltage-controlled (saturated switch) type fuel injector waveform looks like on a lab scope.