F 150 4WD Pickup V8-4.6L VIN W (2006)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - MIL ON/DTC's P0505/P0506/Hard Start
TSB 08-18-2
09/15/08
MIL ON - P0506 AND/OR P0505 - HESITATION/LOSS
OF RPM/DIFFICULTY STARTING/LOW IDLE RPM
FORD:
2005-2007 Crown Victoria
2006 Mustang, Mustang
2004-2006 F-150, F-150
2005-2006 E-350, E-450, F-Super Duty
2006 F-53 Motorhome Chassis
2006-2007 Explorer Sport Trac, Explorer
LINCOLN:
2005-2007 Town Car
2006 Mark LT
MERCURY:
2005-2007 Grand Marquis
2006-2007 Mountaineer, Mountaineer
This article supersedes TSB(s) 08-5-13, 07-23-12 and 06-25-8 to update the Service Procedure.
ISSUE
Some 2004-2006 4.6L and 5.4L F-150 (excluding F-150 Heritage), 2006 5.4L Mark LT, 2005-2006 6.8L E-350 / E-450, 2005-2006 6.8L F-Super Duty
(F-250 to F-550), 2006 6.8L F-53 Motorhome Chassis, 2006-2007 4.0L Explorer 4 dr, 2007 4.0L Explorer Sport Trac, 2006-2007 4.0L Mountaineer,
2006 4.0L Mustang, 2006 - 2007 4.6L 3V Explorer / Explorer Sport Trac / Mountaineer, 2006 4.6L 3V Mustang, and 2005-2007 Crown Vic / Grand
Marquis / Towncar 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 air[low less than desired.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
1.
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 the website. The calibration contains a sludge
compensation strategy for the throttle body.
2.
Turn the key off to re-initialize the PCM. This will allow the sludge compensation strategy to learn.
3.
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.
4.
While the engine is running, using IDS datalogger or equivalent, check the PID value of ETC_TRIM.
a.
If ETC_TRIM value is 3.5 degrees, and/or DTC PuSE is present, then replace the electronic throttle body (ETB), following Workshop
Manual (WSM), Section 303-04B.
b.
If ETC_TRIM value is less than 3.5 degrees and DTC PuSE is not present, but driveability concerns persist, the ETB is not the likely cause
of the concern and replacement is not necessary. Continue with normal PC/ED diagnostics.
