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FUEL SYSTEM
COMPONENTS
Fuel Injectors
Fuel injectors are fuel metering (55 V), electric
solenoids bolted directly to the cylinder head. The
EMM supplies 55 V and controls the activation of
each injector.
Fuel Flow Compensation
Flow tests included in the injector manufacturing
process measure the flow rates of each injector.
Each injector's fuel flow rate is recorded and con-
verted to specific coefficients. These coefficients
are assigned to the injector by serial number.
Each individual service injector includes these
coefficients on a 3.5 in. floppy disk. This software
information enables the EMM to control each
injector based on unique fuel flow characteristics.
IMPORTANT: The cylinder location of each
injector must always be maintained. EMM pro-
gramming is associated with the cylinder location
of each injector.
Injector Fuel Supply
Fuel is supplied to the injectors by the fuel circula-
tion pump and the fuel supply manifold.
Each injector has internal fuel passages. These
passages are designed to:
• Provide fuel to the injector's injection chamber
• Route fuel through the injector housing to cool
the injector coil and armature
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