P0430 Catalyst Efficiency bank 2 problem?

I have a 1999 Ford Taurus SE v6. I had to replace the motor because it blew a head gasket. When I got the car back with the new motor the light came on. I just changed the bank 2 cat today (the one closest to the front). I had the code P0430 cleared. I went 36 miles and the light came back on. The car sometimes is hesitant when I crank it first thing then it clears up and runs smooth when it warms up. Is it now the 02 Sensor? & which one do I supposed to change? I'll consider all answers.

Cost of deck installation for ford Taurus 04?

I have ford Taurus 2004 and I have the standard steered system in it. I hear it's a pain to install it in this car so how much will it be to get it installed professionally with the new parts and everything besides the deck itself?

Why won't 2000 Ford Taurus start after running pretty good?

I have a 2000 Taurus SE 3.0 Liter/ 6 Cy. After driving the car for about an hour in all the other day, I parked it and went out with a friend but when we came back the car would not start. It would make 1 click when key turned and then nothing else would happen. Electronics/ light come on fine and I also believe I hear the fuel pump turning on fine. This is only the second time the car wouldnt start, the first being during that horrible winter last year but that only lasted a day. I have been bad with getting oil changes as I'm a college student barely affording gas but try to make sure oil is in the car. I have tried jumping the car, as well as knocking on the starter(i don't know if I did it right though) but neither worked. I have even cleaned the battery connectors best I could and reattached them but still nothing. I'm in the process of finding a mechanic to look at my car so any info provided here would be greatly appreciated

Car starts rolling again after brakes pressed?

My girlfriends Ford Taurus stops like normal when the brake is pressed, but then after stopping completely it makes a rough sounding noise and starts rolling like the brake isn't pressed down, but it is. Any help would be appreciated.

What causes problems starting a car and the engine to misfire going over 60 mph?

This problem started about two months ago. I have a 2006 Ford Taurus. So far no mechanic can figure out the problem. They have replaced all of the spark plugs (numerous times because they keep going bad), an engine coil, the crankshaft position sensor, the battery, did a tune-up, ran a $100 diagnostic test and still the problem occurs. Anyone have any idea what could be the problem?

Added (1). I forgot that they also did a coolant flush.

2001 Ford Taurus power steering fluid leak?

My husband bought a new power steering pump and installed it last week, but when he added the power steering fluid it leaked out almost immediately. Any idea of what would cause this?