Buell 2007 FIREBOLT Service Manual page 391

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Code 13 Test (Part 2 of 3)
NO.
0.0-0.4 volts.
Perform 4.13 FUEL
PRESSURE TEST.
Pressure too low?
YES
Repair low pres- Check for restricted
sure problem. See fuel filter or fuel line.
4.13 FUEL PRES- Restriction
SURE TEST. present?
Replace fuel line
or filter.
4-50 2007 Buell Firebolt: Fuel System
Continued from
Turn ignition OFF and reconnect oxygen sensor. Turn ignition
ON and start engine. Allow engine to reach operating tempera-
ture. With engine idling, does voltage quickly fluctuate
between 0.1-0.8 volts?
0.6-1.0 volts.
Perform
PRESSURE
Pressure too high?
NO YES
Replace fuel pump.
See 4.39 FUEL
PUMP.
YES NO
Check for air leaks
at induction
module. Air leak
present?
YES
Repair.
Clear codes and confirm proper operation with no
check engine lamp. Codes can be cleared using
DIGITAL TECHNICIAN (Part No. HD-44750).
Code 13 Test (Part 1 of 3).
NO.
Slow or no change.
4.13 FUEL Check continuity
TEST. between Pin 4 [11]
(gray) and [137]
(V/GY). Continuity
NO
Check for
injectors stuck
open. See 4.22
TROUBLE CODES
23 AND 32. Retest.
Replace oxygen
4.33 OXYGEN
NO
Fuel injectors may be
dirty. See Fuel Injectors
under 4.42 THROTTLE
BODY.
NO. YES
STOP
present?
Go to Code 13 Test
(Part 3 of 3).
YES NO
Repair open
sensor. See on V/GY wire.
SENSOR.