2005 5.4 keeps stalling
#31
09-30-2008, 11:27 AM
Some 2004-2006 F-150 (excludes Heritage) vehicles equipped with 4.6L or 5.4L engine, and 2006 Mark LT vehicles, may exhibit one or more of the following symptoms: drive-away hesitation, loss of RPM on deceleration, difficulty starting, and/or idle RPM less than desired. Malfunction indicator lamp (MIL) may be illuminated with diagnostic trouble codes (DTCs) P0506 and/or P0505. These conditions may appear after battery disconnect, dead battery condition, or keep alive memory (KAM) reset. The symptoms may be due to engine deposits in the throttle leading to airflow less than desired.
ACTION:
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 53.9 and higher or 54.1 and higher. This new calibration is not included in the VCM 2008.1 DVD. Calibration files may also be obtained at www.motorcraft.com. The calibration contains a sludge compensation strategy for the throttle body.
Turn the key off to re-initialize the PCM. This will allow the sludge compensation strategy to learn.
With the vehicle in park or neutral and A/C off, start vehicle and allow engine to reach normal operating temperature (greater than 170 °F (77 °C) coolant temperature). Run an additional 5 minutes to allow sufficient learning time.
While the engine is running, using IDS datalogger or equivalent, check the PID value of ETC_TRIM.
If ETC_TRIM value is 3.0 degrees or greater then replace the electronic throttle body (ETB), following Workshop Manual (WSM), Section 303-04B.
If ETC_TRIM value is less than 3.0 degrees, and driveability concerns persist, the ETB is not the likely cause of the concern and replacement is not necessary. Continue with normal PC/ED diagnostics.
ACTION:
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 53.9 and higher or 54.1 and higher. This new calibration is not included in the VCM 2008.1 DVD. Calibration files may also be obtained at www.motorcraft.com. The calibration contains a sludge compensation strategy for the throttle body.
Turn the key off to re-initialize the PCM. This will allow the sludge compensation strategy to learn.
With the vehicle in park or neutral and A/C off, start vehicle and allow engine to reach normal operating temperature (greater than 170 °F (77 °C) coolant temperature). Run an additional 5 minutes to allow sufficient learning time.
While the engine is running, using IDS datalogger or equivalent, check the PID value of ETC_TRIM.
If ETC_TRIM value is 3.0 degrees or greater then replace the electronic throttle body (ETB), following Workshop Manual (WSM), Section 303-04B.
If ETC_TRIM value is less than 3.0 degrees, and driveability concerns persist, the ETB is not the likely cause of the concern and replacement is not necessary. Continue with normal PC/ED diagnostics.
Thanks