Glossary “feedback” Definition:
1). A principle of fuel-system design wherein a signal from an oxygen sensor in the exhaust system is used to give a computer the input it needs to properly regulate the carburetor or fuel-injection system in order to maintain a nearly perfect A/F ratio. 2). A signal to a computer that reports on the position of a component, such as an EGR valve. 3). The return of a portion of the output (actuator) to the input (computer), used to maintain an output device within predetermined limits. 4). The reverse flow of electrical current through a circuit or electrical unit that should not normally be operating, this feedback current (reverse-bias current flow) is most often caused by a poor ground connection for the same normally operating circuit