
161
FUEL SYSTEM
COMPONENTS
7
Fuel Injectors
Fuel injectors are fuel metering (55 V), electric
injector pumps bolted directly to the cylinder head.
The
EMM
supplies 55 V and controls the activa-
tion 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. The disk also
includes the software necessary to install a
replacement injector. This software 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.
005333
Summary of Contents for E-tec 75 HP
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Page 233: ...233 POWERHEAD POWERHEAD VIEWS 10 POWERHEAD VIEWS Port Short Block Starboard Short Block ...
Page 234: ...234 POWERHEAD POWERHEAD VIEWS Port Dressed Powerhead Starboard Dressed Powerhead ...
Page 235: ...235 POWERHEAD POWERHEAD VIEWS 10 Front ...
Page 236: ...236 POWERHEAD POWERHEAD VIEWS Rear ...
Page 237: ...237 POWERHEAD POWERHEAD VIEWS 10 Top ...
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