Car shaking and rattling?

I have a 2000 Ford Taurus, it was driving fine until to day. The car just started shaking rattling, kinda sound ed like a lawn mower. Also seems to lose power at times and has trouble shifting gears. (It's an automatic). Of anyone can help that'd be great. Could it be the transmission it perhaps bad motor mounts?

How to fix 2003 Ford Taurus power steering issues?

I replaced the power steering pump on my 2003 Ford Taurus. It still does not work properly. The pump made a loud whining noise after I first started it up. I topped off the fluid, but the steering is still tough. The whining noise has quit, the reservoir is full and the steering is still stiff. What do I do next? It also spit fluid around my engine bay.

2000 Ford Taurus jerky acceleration?

I have a 2000 Ford Taurus SES Flex Fuel with 148k miles. In a short span of 2 or 3 days my car went from idiling smoothly, to having an issue idling smoothly, to having jerky acceleration. By jerky, I mean when I hit about 3,500 RPM, the car will completely lose all acceleration, but then instantly go back to accelerating, it really does fling me back and forth until I lower the RPM's. When I got the car a few weeks ago we ran the code and it said something about an o2 sensor. Could that be the issue? Any and all information would be much appreciated as I would like to try to fix it before it gets worse.