The VXCF9xx stragegy of which you speak is the ECM code, not the FICM code. However, if Ford flashed your ECM to VXCF9xx, then your FICM also has a new strategy as well.
From the website:
"Unfortunately, this year also saw the release of Engine Control Module (ECM) and Fuel Injection Control Module (FICM) updates that limited power output of the engine and severely degraded fuel economy. Also, in an effort to reduce further issues on the '03 and '04 model years, the same power limiting calibrations were loaded into any vehicle that happened to wander into a Ford dealership for service. Often, these "updates" were applied without the knowledge (or approval) of the vehicle owners. Imagine the surprise of 6.0L owners everywhere who went in for a simple oil change and lost 3-5 MPG INSTANTLY!"
"Often, customers with later ECM strategies will not see the same results from a FICM Reflash that customers with earlier ECM strategies do. Ford dealerships do not have the capability to reprogram your ECM/TCM to an earlier, more desireable calibration; PHP, however, can! If your current calibration is VXCF7xx, VXCF9xx, VXAP2xx, or VXBC9xx, we strongly recommend that you request an ECM/TCM rollback in conjunction with your FICM reprogramming."
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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