update: got the truck back from the dealership, the found roller/rockers bad in the #8 cylinder which caused scoring on the cam. Replaced all under warranty truck runs like a dream now.
New user and first thread. I have a 07 El with 79,*** miles just replaced spark plugs and coil packs on all 8 cylinders. Truck runs extremely rough on start up and idle in park and when in drive at stop lights and stop signs. cant figure out where the roughness is coming from, it sounds like a...
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