Abstract: A system and method operable to turn off, or not fire, injectors in a diesel engine based on conditions in the engine. In one aspect the firing “outage” is spread equally among all cylinders to eliminate shake. The system may include a control module programmed to receive information from the engine and based on the information received control the firing of injectors in the engine, specifically, to turn off certain of the injectors based on the information received. Methods of controlling the firing of injectors in a diesel engine are provided which include the steps of detecting conditions in a diesel engine and using means such as logic or programming to instruct a firing sequence in the injectors of the diesel engine.

Abstract: An alignment rod is disclosed which may include a first portion suitable for attachment to a drill and a second portion configured to guide a drilling operation using the drill, wherein the diameter of the alignment rod is at least substantially constant along a length thereof.