Download Honda Programmable FI

PROGRAMMED FUEL INJECTION
PROGRAMMED FUEL INJECTION
SYSTEM DIAGRAM
Programmed fuel injection provides each cylinder
with a precise amount of fuel to mix with the
incoming air. This results in maximum fuel
economy and performance because each
cylinder is given only the fuel it needs.
To further provide for economy and performance,
the system has two computer generated maps.
One map provides fuel for low speed low load
conditions, and the other map provides fuel for
high speed high load conditions.
The diagram below presents a graphic
overview of the programmed fuel injection
system. We'll examine the fuel delivery
system first and then the engine control
module – after a brief look at the idle air
controls which are not controlled by the
ECM. Next, we'll check out the basic,
correction, and control inputs. And, finally,
the ECM control outputs.
CRANKSHAFT POSITION SENSOR
CAMSHAFT POSITION SENSOR
PROGRAMMED FUEL INJECTION
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