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| 2003 to 2007 6.0L Power Stroke Diesel 6.0L Power Stroke Diesel equipped Super Duty and Excursion |
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#21
Tue, June 22nd, 2010, 08:40 PM
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Its mainly the FICM on the mpg part. The PCM/ECM can also effect the MPG but that is easily solved with a programmer(Gryphon, SCT etc), vs. the FICM with is more difficult to program, or a specialty so to speak. While its not necessary to flash the PCM/ECM when you do a FICM re-flash, some people just prefer the truck running the way it did new. A stock ECM/PCM and a Reprogrammed FICM will run better, than the same programmed FICM and a Ford Flashed ECM/PCM. Each ford flash de-tunes the trucks a little more and a little more.
I didn’t realize how much until, I changed the FICM in my 05 EX. While it ran better with the PHP FICM and the ford flashed PCM/ECM, it ran allot better when I changed the ECM/PCM back as well.(I have spare ECM/PCM's so I can change it back and forth to notice the difference). I did bring to light my weak injectors, that the ford flashes cover-up/hide, but I'm still under warranty so I'll have them addressed.
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19 F-350 6.7 Auto 16 F-350 6.7 Auto 05 Excursion 6.0, Auto, PHP Atlas 40 FICM, ARP Studs VXBC6(truck PCM) 00 F-350 7.3, 12 Speed, PHP Gryphon, PHP hydra, DAC3 95 F-Superduty 7.3 DI, Auto, Mechanics Truck 94 F-Superduty 7.3 DI, 5 speed, Flatbed Last edited by Jeremy; Wed, June 23rd, 2010 at 11:33 AM. 
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