2007 Buell Firebolt: Fuel System 4-67
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TROUBLE CODES 23 AND 32 4.22
GENERAL
Front Fuel Injector (Code 23)
And Rear Fuel Injector (Code 32)
See Figure 4-46. The fuel injectors (1, 4) are solenoids that
allow pressurized fuel into the engine intake tract. The injec-
tors are timed to the engine cycle and are triggered sequen-
tially.
The power for the injectors comes from the ignition relay. The
ignition relay also provides power for fuel pump, ECM, vehicle
speed sensor and the ignition coils. The ECM provides the
path to ground to trigger the injectors.
NOTE
Ignition relay failures or wiring harness problems will cause
12 volt power to be lost to both injectors, ignition coils, ECM,
vehicle speed sensor and fuel pump.
DIAGNOSTICS
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the Code 23/32 flow charts.
1WARNING1WARNING
To prevent spray of fuel, purge system of high-pressure
fuel before supply line is disconnected. Gasoline is
extremely flammable and highly explosive, which could
result in death or serious injury. (00275a)
1. Purge fuel line. See 4.39 FUEL PUMP.
2. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), purple pin probes and patch cord.
3. Connect BREAKOUT BOX (Part No. HD-42682) to ECM.
See 4.6 BREAKOUT BOX.
4. Use FUEL INJECTOR TEST LAMP (Part No. HD-34730-
2C).
Figure 4-46. Fuel Injectors
Figure 4-47. Fuel Injector Connector
2
5
1. Rear fuel injector
2. Fuel rail assembly
3. Clip (2)
4. Front fuel injector
5. Fuel rail fastener
10644
4
1
3
3
5
8822
1. Fuel injector connector
2. Tab
1
2
2
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