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Exhaust clean shudder?
Hey folks - 2011 6.7 with 16k miles. Want to see if anyone else has had this issue during regen. Doing highway speed (55-75), dashboard says it is going into exhaust clean mode, about a minute later the truck begins a steady engine shudder for entire regen cycle. Accelerate or deccelerate will stop the issue, but if cruise left on it seems like u-joints will wear soon. It is very noticeable...even the wife (who notices nothing) said "what the heck is going on". So...common sense said it was starving for fuel, so 1. brought it to dealer and had both fuel filters changed. Still doing it, so 2. brought it back and had them look at the issue and they did a computer update. Seemed to be even worse, so 3. brought it back and asked them to keep it until fixed, but got a call in the afternoon and tech told service that all readings were ok...but he never drove it through the regen cycle. Service advisor is saying this is probably normal. I am on my way to talk to them today and I guess take the truck back, but I am certain the issue will not be resolved. Anybody else have this and got a resolve? any help would be appreciated.
2011 250 Silver Crew Lariat Fx4
51 gal fuel/tool
2008 6.4 CC 4x4 250 - traded after 15k miles
2008 6.7 CC 4x4 2500 - traded after 20k miles
2000 7.3 CC 4x4 250 - traded after 280k miles
1998 4.6 CC 4x4 150 - traded after 30k miles
1990 4.3 stepside - traded after 295k miles