your dealer is not your friend pete. you want nothing to do with rail presure increase in a common rail. depending on which edge 'chip' it probably uses rail pressure increase unless they have changed them lately. [also chips are for eating salsa with]
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[they are [boxes] for the cummins or downloaders.
i believe i would look into the smarty downloader for the late 04 if it was mine.
back when my 03s were new i used the bdog downloader before the smarty was out and was tickled with them.
remember, say NO to rail pressure increases
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