1994 Geo Metro - Diesel Injector Driver Module

What is a Diesel Fuel Injector Driver Module?

The diesel fuel injector driver module (FIDM) is a component in the fuel injection system used to control and manage the fuel injection process in vehicles equipped with diesel engines. Since diesel fuel combusts due to compression as opposed to spark, the FIDM operates differently than a traditional fuel injection control module. The FIDM accounts for the increased pressure of compressed fuel specific to diesel fuel injection systems, and regulates the timing and duration of fuel injection into the combustion chambers to optimize engine performance, fuel efficiency, and emissions. Some FIDMs can also include diagnostic capabilities to monitor the performance of individual fuel injectors and help detect issues such as injector clogs, misfires, or electrical faults. This information is relayed to the electronic control module for adjustments or to alert the driver to a problem that may require repair or further diagnosis. O'Reilly Auto Parts carries replacement diesel fuel injector driver modules, high-pressure diesel injection pumps, fuel injectors, and other fuel system components for most diesel vehicles.