XLF4 Calibration
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Mountain Pass
Joined: Jan 2004
Posts: 110
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From: Oregon
XLF4 Calibration
I have a first series 99 F250 with the XLF4 calibration. I have ran the Superchip module for about 4 yrs but noticed some power loss. I tried the Edge programmer and loved it, except the black smoke was so thick the cars behind me would move to the side to get out of the wake. It was the worse that I have ever seen a diesel smoke. Has anyone with the XLF4 code tried the new Predator? Also, will the Predator allow programming tire sizes up to 38"?
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