Engine Controls - Hesitation/Runs Rough on Cold Start
TSB 07-24-312/10/07
COLD START ROUGH
RUNNING/HESITATION/BACKFIRE - 5.4L ONLY
FORD:
2007-2008 F-150
LINCOLN:
2007-2008 Mark LT
ISSUE
Some 2007-2008 F-150 and Mark LT vehicles equipped with a 5.4L engine only, may exhibit a rough running, hesitation and/or induction backfire during the first drive away event following an overnight or extended soak. No diagnostic trouble codes (DTCs) or other driveability concerns should be observed. This typically occurs when the ambient temperature is below 60 degrees F (16 degrees C). The event will last only 20-40 seconds and normal operation will return once the system enters closed loop. This TSB only applies to:
^ F-150 and Mark LT vehicles built between 12/4/2006 and 10/25/2007 at the Dearborn Truck Plant.
^ F-150 vehicles built between 12/4/2006 and 10/29/2007 at the Kansas City Assembly Plant.
^ F-150 vehicles built after 12/4/2006 at the Norfolk Assembly Plant.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
NOTE
IF OTHER DRIVEABILITY CONCERNS ARE PRESENT OR NOTED BY THE CUSTOMER, DO NOT CONTINUE WITH THIS TSB. FOLLOW NORMAL WORKSHOP MANUAL (WSM) DIAGNOSTICS.
NOTE
NO DTC'S WILL BE PRESENT WITH THE CONDITION THIS CALIBRATION IS DESIGNED TO ADDRESS. IF DTC'S ARE PRESENT DO NOT CONTINUE WITH THIS TSB. FOLLOW NORMAL WSM DIAGNOSTICS.
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 51.5 and higher. Calibration files may also be obtained at the website.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
072403A 2007-2008 F-150, Mark LT 0.4 Hr.
5.4L: Check DTCs And
Reprogram The PCM (Do
Not Use With 12650D)
DEALER CODING
CONDITION
BASIC PART NO. CODE
RECAL 04
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