Did this issue ever get resolved? I am experiencing the same symptoms with my PA. I had vacuum checked - okay, new plugs and wires ~ 10k ago, I'm thinking either fuel filter plugged or MAF/O2 sensors. Mechanic mentioned cleaning one sensor (prob MAF, not sure anymore). The problem did go away for a while, but reappeared 500 miles later. This is leading me to think its a dirty sensor??

Welcome to AF.

Your post has been moved to the Buick Park Avenue forum.

It would help to annotate the year and model PA and current mileage.