4.28
Fuel Systems
Engine Coolant Temperature Sensor
Knock Sensor
Fuel Injectors
Fuel injectors are flow tested and then color coded (RED,
BLUE, or YELLOW) based on how much fuel the injector flows
during the test.
800 CFI fuel injectors (all colors) are a high flow version of the
fuel injectors used on 600 / 700 CFI engines.
When replacing a faulty fuel injector, always verify the part
number of the injector for the engine application and use the
same color code. If replacing an injector with a different color
code, all four fuel injectors must be replaced with the new color
so all four injectors are the same color.
After replacing all four injectors, the ECU must be re-flashed so
the fuel calibration map matches the new color coded fuel
injectors.
Sensor Specifications
Operating Temperature Range
-22_F - +248 _F (-30_C -
120_C)
Resistance
2.4 - 2.6KΩ@ 68_F (20_C)
(Measure in stirred water)
Installation Torque 29 ft.lbs. (39.2Nm)
Specifications
Resistance 12Ω @ 68_F (20_C)
CAUTION
800 CFI ENGINES USE HIGH FLOW FUEL
INJECTORS. ALWAYS CHECK THE INJECTOR PART
NUMBER TO VERIFY ENGINE APPLICATION
REGARDLESS OF COLOR CODE.
NEVER RUN THE ENGINE WITH DIFFERENT
COLOR-CODED FUEL INJECTORS. SEVERE
ENGINE DAMAGE WILL OCCUR.
ALWAYS VERIFY THE ECU CALIBRATION FILE
MATCHES THE FUEL INJECTOR COLOR CODES.
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