Boost Gauge Needle Fluctuation During Steady Highway Speed – 2011-2014 Ford F-Super Duty

6.7L – BOOST GAUGE FLUCTUATION DURING STEADY STATE HIGHWAY SPEED DRIVE CONDITIONS – BUILT ON OR BEFORE 3/14/2014

 

FORD:

2011-2014 F-Super Duty

 

2011-2014 F-Super Duty vehicles equipped with a 6.7L diesel engine and built on or before 3/14/2014 may exhibit a boost gauge needle fluctuation during steady state highway speed drive conditions with or without cruise control active.

 

SERVICE PROCEDURE

1. Using Integrated Diagnostic Service (IDS) tool or equivalent Scan Tool, check all continuous memory diagnostic trouble codes (CMDTCs). Are any DTCs present?
   1. Yes – this article does not apply, refer to Powertrain Control/Emission Diagnostic (PC/ED) manual for normal diagnostics.
   2. No – proceed to Step 2.

2. Using the IDS, enter powertrain control module (PCM) datalogger and select the following parameter identifications (PIDs):
   1. Make sure the engine coolant temperature has warmed up to 70 °C (158 °F) or greater by monitoring ECT1.

• EBP (psi/kPa)
• RPMDSD
• VGTDC (%)
• EGR_A_CMD (%)
• EGRTP_CMD (%) – TURBO_WGATE (%)
• ECT1

3. Perform the following active commands and make a recording. Recording time should be set to 60 seconds with no pre-trigger time on the following PIDs:

• Command EGR_A_CMD to 0%
• Command EGRTP_CMD to 0%
• Command Turbo_WGATE to 0%
• Command RPMDSD to 1500 RPM
• Command VGTDC to 0%

Press record button and command the VGTDC from 0% to 100% in 5 seconds increments. Make sure to highlight VGTDC prior to pressing the record button.

4. Compare the IDS recordings.
   1. Increasing the EBP scale and window size may help in viewing EBP response.

5. Does the EBP (psi/kPa) start to fluctuate when VGTDC is commanded to 30% – 50%?
   1. Yes – replace the turbocharger actuator.
   2. No – this article does not apply, refer to PC/ED manual for normal diagnostics.

 

PART NUMBER	PART NAME
BC3Z-6F089-A	Turbocharger Actuator
BC3Z-9439-A	Upper Intake Manifold Gasket A
BC3Z-9439-B	Upper Intake Manifold Gasket B
BC3Z-9439-C	Upper Intake Manifold Gasket C (2 Req)