MAF. MAF. MAF. Completely classic signs. The cylinder problems are likely fouled spark plugs. Fix the MAF and replace the spark plugs in the necessary cylinders - problems solved. Also, I'm guessing (just guessing) that you didn't go to a P mechanic. The MAF has got to be the first choice for this problem and should have been diagnosed quickly by a P-car mechanic.
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'06 Cayenne Turbo S, Beige Metallic/Tan
Ex - '99 Arctic Silver, Red Interior, Silver Top
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