4 wheel drive

Have your tie ends checked!! You can check yourself by going under car and grab drag link and see if you can feel movement. If no movement it should be ok. If it moves by hand get replaced ASAP DO NOT DRIVE!!!!! Drag link is the largest long metal bar at the front under the car.

its missing maybe a coil pack

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: -------

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Acceleration lag problem?

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

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Jerks and Hesitates During Acceleration?

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

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Loss of acceleration?

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

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Headlights flickering and car hesitates to start?

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

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How exactly the Vehicles Accelerator Cable works?

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

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How exactly Vehicles Accelerator Pump Diaphragm Works?

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

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

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

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

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

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Wheel hop under hard acceleration?

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

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2009 Chevy impala accelerator pedal sensor?

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

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Nissan Pathfinder stalls and bucks on Acceleration?

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

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These details will help.

Thanks.

The first thing that needs to happen here is to have the computer control module scanned for fault codes, this is numero uno.

Check fuel pressure. If good, rebuild carb.

have you had the catalytic converter checked. When they break apart they will make a rattle ling noise. eventually the broken pieces will plug the exhaust and cause a lack of power feeling. When the exhaust is cold hit the bottom of the catalytic converter with your hand. If it rattles it is bad and needs to be replaced.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

SOUNDS LIKE A THROTTLE BODY PROBLEM... CHANGE THE THROTTLE BODY AND YOUR AIR FILTER.... IF ITS NOT THAT THERE IS A SCREW ON YOUR THROTTLE BODY IF SCREW IS COMPLATELY DOWN TAKE A PHILIPS SCREW DRIVER AND OPEN IT ....

You need to take it back to one of those mechanic and have them check out the tps sensers, or you can also have a bad gas padple.

the jerking may be from the 3-4 spring in the valve body of the transmission. as for the shakes well it is a good chance that the rotors need be turned or just replaced. as you go through water when the brakes heat up it can cause warping in the rotors due to wear or just too thin. also check ball joints. Lincoln had recalls on the lower ball joints failing. its one piece and about 300.00

HI MY NAME IS JUAN:
I HAVE A 93 BUICK SKYLARK CUSTOM
AND I HAD THE SAME HESITATION.
I CHAGED GAS FILTER, AIR FILTER, AND USE SEA FOME IN MY GAS TANK AND USE IT ALSO TO CLEAN THE INTAKE SYSTOM, AND IT HELPED ALOT. TWO MONTHS DOWN THE LINE HADE THE SAME HESITATION AND IT WAS ONE OF THE INISION COIAL PACK WAS NOT GIVING THE ELETRICAL SPARK TO THE PLUG. I CHECK IT BY PULLING THE CABLE OFF THE SPARK PLUG WITH THE CAR RUNNING AND FOUND THE ONE THAT WAS NOT GIVING SPARK. I REPLACED THE PACK FOR THAT CILINDERS PLUG AND THE PROBLEM WAS GONE.
HOPE THIS CAN HELP YOU.