While driving vehicle all of a sudden lost acceleration power?

My car will not accelerate as it should. When I try to do so, it shakes and seems to have a hard time pushing past 25mph. After some clicking (which sounds like its coming from underneath the driver seat area), it will SLOWLY make its way to about 40mph. No matter how much I press and let off the gas, my car will not speed up- though the RPMs will jump around. The clicking noise will happen again a few more times. Then the car will kind of "kick" forward and pick up speed. No weird smells, no leaks that I have noticed. I had my oil changed around the begining of January of this year, and also I had to get both my upper and lower radiador hoses replaced due to dry rot. Could you give me an idea as to what this might be, and how much it usually costs?

Engine Mechanical problem
2004 Ford Taurus V8 Two Wheel Drive Automatic

we took the car to anmco 900 hundred dollars latter they said we hads to take it to a ford dealer to get co sensor replaced and car reprogramed. Called ford they said bring it in but did not have a clue what anmco was talking about. This was at the bottom of the bill. Came in with cat convertor code and 02 sensor and car would not move without dying. Inspected bank 2 cat and found it damaged and empty. Inspected rear cat converter and found it was plugged up. Replaced cats and cleared codes. 02 sensor code came back and has poor acceleration. When first starting in morning the car stalls out until warm. Has no power.

I was in the midst of turning around and the power steering just stopped working. I pulled into a gas station and checked the reservoir which was empty save some foam which was vigoriously circulating. I bought a quart of fluid and added it while the engine was running and it promptly dissipeared. I stopped the engine and it bubbled back up through the top. The pump is working and there was no fluid on the ground from under the car. I was forced to drive home about 75 miles without power steering. No noise was evident. I assume I blew an o ring in the PS unit and the fluid is in the piston or boots. Any ideas? Can the unit be rebuilt or does it have to be replaced. The car is NOT in warentee.

Mark, I will do it as soon as it gets above freezing today. Thank you

Loss of power, we had a vacuum leak in intake so we replace PCV valve with o-rings, now it runs smooth but has no power going up slight hill.

Thanks, we think we discovered that one of the front two converters has sent pieces out causing the 3rd rear converter to clog. So far, we lowered the bolting of the rear one and drove it, much more power and shifting correctly. So is it necessary to change the rear one, or can it be cleaned. We were told to remove it and put a pipe there. However we were told if you do that the oxygen sensor will cause it to dump more fuel. Which is best?

This is a recently purchased vehicle that I just replaced the transmission in. The car has been running fine until one morning when I tried to start the engine would not turn over, the starter just spun. After awhile I tried again and the engine fired. It will build up to around 2500 rpm running smoothly then bog and run rough and drop the rpms to around 800 to 1000. This is accompanied by a single exhaust backfire.

04 taurus eng code -u intermit power loose up hill&flat land. Had crank sensor code replace 2 days later no start next day start runs, 2day later light on codespo300 po302 po316 po351 po352 replace coil pack, fuel pump noisey replace, fuelfilter clear. Run car same problem, then got codes same codes xcept po302 insteed got po301 po304 put old coil back on lost code po304 stall had oter codes.