2000 mercury cougar hesitating/jerking

almost sounds like the cruise control is engaging

ENGINE HESITATES WHILE ACCELERATION

LOSS OF ACCELERATION

It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

-----------

Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

---------

Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

--------

How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

-------------

How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

--------

2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

---------

2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

---------

Wheel hop under hard acceleration?

http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

--------

2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

---------

Nissan Pathfinder stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

--------

Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

-------------

These details will help.

Thanks.

I HAVE THE SAME PROBLEM :( IT MAKES A CLICKING SOUND 2ND TRY IT HESITATES TO START 3RD TIME IT TURNS ON AND IDK WHAT TO DO I START SCHOOL MONDAY :(

replace fuel filter and if that dont work check spark plug wires

Probably a bad tank of gas. Go to your local parts store and buy a bottle or two of Heet. It's in a yellow bottle. Then drive to the nearest Chevron or Shell gas station and top off the tank after dumping the Heet in. If the problem persists then change out your fuel filter.

Time to go get it diagnosed. Could be a tunup issue or cranks sensor or fuel pump. You most likely have a code stored to help diagnosing

Unfortunatley, there are many problems with this model. "google" Cougar and youwill find many unhappy people. Open windows will get the inside of the car wet, but will not affect the gas. It sounds like a bad tranny, but try some drygas first.

First, disconnect neg battery cable 10 minutes and reattach to clear codes.
Lean condition means it is not getting same fuel as other side of engine.
Since you had it scanned before, try Autozone to see if new results.
You might try a TPS switch which regulates spark and fuel feed. At lower speeds EGR starts to open-you should have code for a problem there.

Change the fuel filter and put some good gas in with injecter cleaner.Run it down the highway.