Abstract: An apparatus for in-vehicle testing of electronic fuel injection systems and/or electronic ignition systems. The apparatus selectively is able to sense, at least voltage, resistance and pulse width, and is capable of processing the sensed information, selectively displaying the voltage, resistance and pulse width information on a front face of a hand-held enclosure which contains the apparatus. The apparatus also includes sensors for oxygen sensing, temperature sensing and the like, and a pulse injector. The apparatus is specifically for use in diagnosing faults in and/or maintaining vehicle injection and ignition systems in a work shop or roadside breakdown situation.

Abstract: A device to aid in the servicing of electronic fuel injectors for automotive engines, the device includes a mounting to receive the injectors so that the nozzles thereof are exposed to be viewed by an operator, a liquid under pressure is delivered to the injectors together with an electronic pulse to operate the valve mechanisms within the injectors, the device further includes a second mounting within which the injectors are mounted enabling the injectors to be subjected to a backwashing procedure to clean the filters within the injectors.