I thought I was alone with this issue, until I found this thread today. I've had this same problem for about a month now it's happened four times. The last time was today pulling up to a red light, the truck starts shaking and spudder like it's running out of gas. Hitting the gas peddle doesn't help, turn the truck off and restart and all is fine. So far this has only happened with my custom performance tune. If I use my stock tune the truck runs great. I also have a custom tow tune but only use it when pulling my boat and have had no problems with it yet. I hope we can figure this out, I love my Gryphon. 06 Lariat 5.4 43,000.
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