Chrysler 2005 Crossfire SRT6 Service Manual page 2157

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(P0171) FUEL SYSTEM 1/1 RICH CONTROL OVER LIMIT (AT LOAD) (CONTINUED)
4.
O2 SENSOR OPERATION
Start the engine.
Allow the engine to reach normal operating temperature.
With the DRB III , read the O2 Sensor voltage.
Is the voltage switching between 0.4 and 0.6 volt?
Yes >> Go To 5
No >> Go To 9
5.
EVAP PURGE SOLENOID OPERATION
Turn the ignition off.
Disconnect the hoses at the Evap Purge Solenoid.
Note: Check connectors — Clean/repair as necessary.
Using a hand vacuum pump, apply 339 mbar (10 in. Hg) of vacuum to the Evap Purge Solenoid vacuum source
port on the component side.
Did the Evap Purge Solenoid hold vacuum?
Yes >> Go To 6
No >> Replace the Evap Purge Solenoid. (Refer to 25 - EMISSIONS CONTROL/EVAPORATIVE EMISSIONS/
EVAP/PURGE SOLENOID - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
6.
MAP SENSOR OPERATION
With the ignition off.
Connect a Vacuum Gauge to a Manifold Vacuum source.
Start the engine.
Allow the engine to idle.
Note: If engine will not idle, maintain a constant RPM above idle.
With the DRB III in Sensors, read the MAP Sensor vacuum value.
Is the DRB III reading within 33.9 mbar (1 in. Hg) of the Vac-
uum Gauge reading?
Yes >> Go To 7
No >> Replace the Manifold Absolute Pressure Sensor. (Refer to
14 - FUEL SYSTEM/FUEL INJECTION/MAP SENSOR -
REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 233