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I have been having the same problem. Mine does it only after a regeneration mode. I do have a Juice with Attitude and an AFE intake.

I have not done the DPF delete yet, it is coming soon.

I contacted Edge with my question about the EGT's bouncing up and down, and this was the reply.

I would say it has something to do with unburned fuel still left inside the DPF that did not get completely burned while the truck was in regeneration. I have wondered the same thing because I have seen our truck do it also. It doesn't seem to hurt anything so we never really worry about it. I did talk to the engineer about it and he said its either unburned fuel or possibly something to do with pressure releasing out of the DPF. Either way I would not stress it, I am sure everything is working properly. Let us know if we can help with anything else.
 
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