Greetings and good evening to all in the land of all things Bitog! So, my son-in-law brings me his 1996 Buick Century station wagon (known as "Tighty Whitey"). It's running rough and stalling. It might run good for about five minutes and then starts to idle roughly. Periodically, it will stall both in park while in the driveway and in drive during exciting moments at stop signs and stop lights. Sometimes it accelerates like a scalded dawg and other times, bucks like a roped bull. So far he has replaced, the EGR valve and the MAP sensor. He also cleaned the MAF sensor and the throttle control sensor. He pulled a couple of the plugs and said they look nice and clean and from what I can tell, the ignition wires look good. He's frustrated and brought it to me thinking I could fix it. But before I starting wrenching on this bad boy, I thought I would come to wise motor guru's here at Bitog and get some guidance. "Tighty Whitey" is a 1996 Buick Century Wagon with a 3.1 V-6 mated to an automatic transmission. Said vehicle has 200,000 miles on it, burns no oil and uses no water, (so I don't think it's an intake gasket issue). I'm thinking it could be - Fuel Pressure regulator, (although, I ran it for about half an hour in the driveway with the vacuum line removed and the regulator spat no gas out the top. However, the fitting where the vacuum line joins the Fuel Pressure regulator does smell strongly of gasoline. However, with the vacuum line disconnected, the motor still ran rough and stumbled periodically). Fuel filter. I have no idea when this was changed. Fuel Pump. Could it be getting weak? Coil pack. Could this be going bad? O2 Censor. I think it's original. Thoughts, opinions, words of wisdom - Thanks.