Sluggish slow acceleration

Get a code reader and plug it in. The check engine light might not be working.
autozone etc. can check the codes for free.

Is this a Turbo model? If so, it sounds like you have a blown Turbo or a leak somewhere in the turbo system. 200 miles is a long way to go with a bad part, and it's pretty risky. I'd get it checked out by a local mechanic before trying to drive that far.

check fuel pressure and if good clean mass air flow sensor also check spark plug gap

run fault codes as it may be the accelerator position sensor Check the cat converter for failure that is blocking the exhaust pipe.

Sounds to me like the timing is off! it COULD be bad gas though! run that tank through, and refill, then see how it feels!

could be coil packs, or maybe a camshaft position sensor.

Try changing the automatic transmission fluid and the transmission filter. There are also bands on the transmission that can be adjusted. You will need to buy the service manual at your local auto parts store to get the exact specifications for adjusting the bands.

goto walmart and get wynn's signature engine tuneup(8$) and put in your engine and run for 100 kms then have a oil change see the difference.

There is a vaccum assist module on the transmission, which uses alot of vaccum and helps control your shifts, check that vaccum line at the intake manifold and the transmission to make sure it is connected, this line being off can cause you alot of problems,
The battery, check to make sure your cables are in good shape and connections are tight and clean, make sure you put the new belt on right.
If you have it on wrong you could be spinning the alternator backwards, then it would'nt charge.

check the fuel filter and when was the last time you had a tranny service done and a tune up also check the drivebelt