Throttle Body Injection

Throttle body injected engines use a constant pressure high pressure fuel system. The high pressure pump provides high pressure (11 psi or 29 psi dependingon model) to the injectors and the pressure regulator. Because the injector tips are always open to atmospheric pressure, fuel system pressure remains constant throughout the engine operating range (idle to wide open throttle).

The throttle body assembly is mounted on a conventional carburetor type intake manifold. It is used to control air flow into the engine, thereby controllingengine power. The throttle plates within the throttle body are opened by the operator through the throttle control.

MEFI Fuel Injection