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This just started. No RPM change at all but at a stop light I can feel a vibration on my brake pedal. One of them vibrations that will tickle. I thought it might be a cylinder missing but like I said, the RPM's don't fluctuate. I "think" I might have lost a little power. Hard to say since it still runs like a scalded dog.

I got an update on my PPE programmer a few weeks ago and no longer have the rattle. It's set on level 2. I also notice smoke that I don't think I had before. I've been driving it around for a couple of weeks with the updated program. Any ideas? I just fuel up a day or so ago too.
 
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