The really attractive thing about running a chip on the 7.3L vs. running a flash programmer is that there is no P1000 code left behind (common of reflashing to stock) that will cause a "retest" situation for emissions. Removing a chip will only set a P0603 code that generally will not cause an emissions failure (unless you get some over-the-top inspector that knows nothing). What will cause problems are the actual trouble codes that have been set while running a chip (overboost, low ICP, etc.) or if there are actual problems with the truck.
You are right Joe, nothing is "left behind" when the chip is removed, except codes relating to actual problems. If you clear the codes, you will get a P1000 code that will require you to drive around for a while and then retest.
If there is no physical inspection of the truck, just an opacity test and scan test, you may be able to get away with testing with chip in....just set it to the lowest setting and run it.
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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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