We are using premium gas....91 octane is the highest we can get in Phx. My hubby agrees it could be detonation...I took it in today to have it checked out. I even asked to have the spark plug wires checked since some of you have found them to be failing around 20-25 thousand miles. I was told there were no codes to indicate the engine was missing or misfiring and that the wires were fine. Do you think I could duplicate it this morning at the dealership? Nah! So we are going to drive up north on Mon. afternoon and will check this out...again!
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