Thread: Backwards compatibility
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Old Wed, December 30th, 2009, 02:55 PM
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On second thought, I will assume that you have cleaned the PCM contacts good enough.

This is just me thinking out loud but it goes for ANYBODY doing tuning. If you put two or more different tunes on a chip that are not the same hex (i.e. VDH5 in position 1 and VDH2 in position 2, etc. ) then you will have a stall condition when you change programs.

DO NOT MIX HEX CODES ON A CHIP!
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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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