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Message: [QUOTE="Arisley, post: 675313, member: 67"] OK, good question. The resister mods simply lie to the PCM. End result is bad things. Not now, but down the road. You need a real chip, one you install in the PCM, you can get them with anywhere from a single tune, all the way to 16 tunes. These tunes do not lie to the PCM, they replace the programming on the PCM. These tunes are written by guys with a lot of years writing tunes for a 7.3. My truck is an early 99. It is a long way from stock. I have Custom Tunes written on it from Tony Wildman. Without the tunes the truck will run, but it does not like it. Another good question. That is totally up to you. Kinda looks like you are on the way to changing it already. Just take a step back a bit and calm down, at least until we get to know you a bit. And you us. [/QUOTE]

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