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98.5 surgeing between 40 and 55 mph?

524 Views 0 Replies 1 Participant Last post by  FRH290, 
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I have a small problem and I do hope that someone can help. Problem started about 1 month ago, I was going 50 and my truck started to surge. I mean RPMS cut from high rev down and back up. You could heavy accel or you can baby through it but it will act like that till I hit 55mph. I am dealing with it but I would love to fix it. One more thing it has no codes. Truck is stock but has a Bull Dog Programmer (Torque Dog) which is always on. (is that cool or is that bad?) Thanks for any advise!!!:peelout
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