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Message: [QUOTE="PsdPullerJr, post: 1250036, member: 11168"] I have a tune that does that, rev it up and let off and it goes up a couple hundred more rpm and hangs there for a couple seconds. Other tunes it does not do that in, and that is with a gen3. I also had a the motor out of a different truck without a gen3, and at times it would free rev like it was gonna runaway when I would start it. Shut the key off and it died immediately. Restart it and it would be normal. Did that maybe half a dozen times till I had a few miles on and never did it after, I'm guessing that was air being thru everything. [/QUOTE]

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