Abstract: A machine for replacing used transmission or power steering fluid in a vehicle with new transmission or power steering fluid includes a frame having a housing. The machine includes a pair of service hoses that extend from the machine and connect to the vehicle for placing the machine in the fluid flow. New, used, and axillary fluid tanks are provided. A pump and a manifold are associated with two of the tanks. The pumps provide for the selective withdraw or insertion of fluid into or out of the tanks. A display on the housing presents an operator of the machine with various tasks or options the machine can perform. A processor controls activation of the pumps and other electrical components based on inputs received by the display. Scales are provided under one or more of the tanks for determining the amount of fluid going into and out of the tanks during the exchange process.

Abstract: Revving an engine may be helpful in various contexts, such as when servicing the vehicle. For example, in some types of services, a cleaning agent may be introduced into the intake and surrounding regions of an engine, and the engine may be revved to reduce a likelihood that the cleaning agent might puddle. In some instances, a device can be positioned within a vehicle interior and can be used to automatically rev the vehicle engine by depressing on the vehicle throttle. In other examples, an engine revving device may send a signal to an electronic-controlled throttle actuator.

Abstract: A cleaning system is provided to reduce, minimize, or eliminate deposits located within gaseous intake, processing, and emissions portions of a vehicle engine. The cleaning system includes use of a cleaning composition for removing such deposits. The cleaning composition can include water; a nitrogen-based dispersant or cleaner; a surfactant; a C6-C18 alcohol; a glycol ether; and an organic acid.