j1mmyr1chter
Member
If you haven't looked at it yet I'd have them check for chaffed wires. http://www.shoforum.com/showthread.php?t=118283
It was something that my dealer took 4-6 weeks to get figured out...what a PITA that was...
Mine turned out to be bad coil packs for the plugs. They were shorting I guess and fouling the plugs as well. They replaced 2 or 3 of the coils and all the plugs. Interestingly, my highway mileage has been as good as 30mpg now! Never thought I would see such a thing from a car this big with this much HP.