I agree with cody, and if you haven't put a wicked wheel or something to cure the surge, its gonna surge when towing something even on in the tow setting. That 60 tow setting, has a lot of power still for towing.
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2000 Ford F-250 ext. cab 4x4 6 spd. Glowshift gauges, egt, boost, and fuel pressure. FU package from PHP, 5 inch straight mbrp exhaust.
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