Bill, I don't know how to explain it. All of a sudden without any warning the truck engine started to shake quite rough. The were no check engine or warning lights that came on and nothing strange appeared on the Gryphon display (all gauges appeared normal). This is what happened twice before when I was on the 87 Performance Tune. After the last time this happened, I have kept it on the stock tune ( over past year) without any stumbling. Like I indicated before this lasted about 20 seconds before correcting itself on it's own (engine stopped shaking and stumbling). The whole truck was literally shaking with the engine stumbling. The engine RPM's appeared to remain steady with no fluctuation. No noticeable smoke coming out of the tail pipe or anything like that. Hope any of the above observations help.
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Wed, July 20th, 2011, 01:09 AM
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