When driving the car it runs as if there is water in the fuel it is very sluggish. How do I check the fuel filter?

jerking can be from many things
1: brakes locked up. or bad.
2: engine jerks
3: transmission jerks.

sluggish, same,
find a shop any auto repair shop to tell you which of the 3 it is.
then post for help.

keep in mind, not one person here can drive your car. and see that.

check for clogged fuel filter or low pump pressure..then on to emissions controls..

Having replaced the computer, best thing you could do now is a complete tune up-new spark plugs, wires, distributor cap, rotor, air and fuel filter. Change the oil and check all fluids. Have the computer scanned for trouble codes. Check if your catalytic converter is blocked or clogged-if bad, they will plug up and stop the car.

Generally, fuel problems cause an engine to lack power.
If the check engine light is on you should have it scanned for trouble codes. The fuel filter should be replaced every 30-50,000 miles and the air filter checked at every oil change.

try adding some lucas fuel treatment to your gas tank to clean those fuel injectors. sounds like you've done everything else i would suggest. hope this helps!!!

change fuel filter check fuel psi

There are quite a few things that will cause the car to drive "sluggish," so I won't try to tell you all of them without a more specific indication of the problem (does sluggish refer to way the engine runs or the way the car handles, for example), but:
Looking at the car from the front, the dip stick for the transaxle is down very low at the left hand side of the engine, close to being under the battery. It is normally yellow. Follow the large water hose that runs down next to your battery. The yellow dip stick handle is right along side of that hose (to the right of it) down low. It will either pull out or unscrew.
Ordinarily, if the transmission has a problem, your D4 light will start flashing. There is a way to read the codes, given the number of flashes and whether they are long or short, but it's involved. If your D4 starts flashing (beyond just coming on when you put it in gear) you probably should have it checked.
Usually, the way an engine runs has more to do with fuel/air mix or ignition than it does with the transmission. Have you, for example, changed your air filter recently? Your plugs? But there are many other things, as I said.
Hope this helps.

Ck your exhaust pipe at rear of car noting any obnoxious smell like rottrn eggs. Hold a piece of paper, I use a dollar bill ,in in front of the exhaust. If it blows the paper gently, you have a catalyctic converter going or is bad. Will need replace if so.

check the sparkplug wires on the firewall side for arching-body seam there that will cut them

the motor moun ts will not cause it to drive sluggish. Check your fuel filter and might be time for a tune up