Fuel Injectors Work
The TBI system took the place of the carburetor as governmental automobile pollution standards increased , as well as a simultaneous increase in consumer requirements for greater fuel economy. In the TBI system, a throttle body sits atop the engine in the location where the carburetor use to reside. The throttle body in fact looks very much like a carburetor, however it performs very much differently. Located within the throttle body are one or two injectors (depending on the vehicle). When the engine is started, a continuous spray of pressurized fuel is discharged thru the injectors, into the intake manifold, and from there on to the cylinders for combustion. The injectors in the TBI system are always open, and spraying fuel when the engine is on. They do not pulse on and off. Furthermore, the one or two injectors are supplying fuel to every cylinder collectively, as did the carburetor, but with much greater precision. While the TBI system, and the advances in engine managem...