TSB Information:
3.5L GTDI—INTERMITTENT STUMBLE/MISFIRE ON TSB 12-10-19
ACCELERATION FROM HIGHWAY CRUISE IN HUMID
OR DAMP CONDITIONS WITH POSSIBLE DTC
FORD:
2011-2012 F-150
This article supersedes TSB 12-6-4 to remove the production fix date, update the Title, Issue Statement, Part List and Service Procedure.
ISSUE
Some 2011-2012 F-150 vehicles equipped with a 3.5L gasoline turbocharged direct injection (GTDI) EcoBoost engine may exhibit an intermittent engine surge during moderate to light loads at cruise, stumble and/or misfire on hard acceleration after an extended drive at highway speeds during high humid or damp conditions. This could result in a steady or flashing malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) primarily for misfire P0300, P0304, P0305, P0306. DTCs P0430 and/or P0299 may also be present.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Insure all hard fault powertrain DTCs are addressed prior to performing the calibration update.
1. Check for DTC P0430. Is DTC P0430 present?
a. Yes - Replace the left catalytic converter assembly. Refer to Workshop Manual (WSM), Section 309-00. Proceed to Step 2.
b. No - Proceed to Step 2.
2. Is the Charge Air Cooler (CAC) equipped with an air deflector plate?
a. Yes - Proceed to Step 5.
b. No - Proceed to Step 3.
3. Install a new CAC, new air deflector plate, and original shield using new retaining pushpins. Refer to WSM, Section 303-12. Proceed to Step 4.
4. Reprogram the PCM to the latest calibration using IDS release 79.02A or higher. This new calibration is not included in the 2012.5 Calibration files may also be obtained at
Buy Motorcraft Parts Online | Official Motorcraft Auto Parts Site | FordParts.com.
5. Install a new CAC and the original air deflector plate and shield using new retaining pushpins. Refer WSM, Section 303-12.
PART NUMBER PART NAME
BL3Z-5E212-E Catalytic Converter Assembly
W520514-S440 Nuts (2 Req)
CL3Z-19E672-A Deflector Plate
BL3Z- 6K775-B CAC .
W711281-S300 Push Pin (2 Req)