97 buick lesabre v6 3.8 so when i hit the gas i get barely any acceleration or none at all sometimese i have changed the fuel pump and fuel filter didnt help changed spark plugs now misfiring im gonna change the wires today and try and see what that does 190,000 miles needs oilchange started this a xouple months ago starts first try everyday but seems i have no power or sluggish when i hit the gas ive been told may be the cat needa chaged or may have a vacuum leak what do you think i should do to solve this annoying issue

Welcome to the forums.
Do you have any OBD2 stored codes?- needs to be read by a good scanner.
What brand plugs/part number did you install ?
The OEM plugs from owners manual are AC-Type #41-921 -make sure they are gapped at .060 inch.

MAF? Do you have a simple vacuum pump/gauge? Scan tool?

Agree with the questions above ^^^^^^^

Also: 190,000 miles on original wires could definitely be related. I swapped mine out at around 130,000 .

Some other questions:

Is the [Check Engine] light on?

How many miles were on the old plugs when you swapped them?

How many miles have you owned the car?

Has this car had any trauma that you are aware of?

Does it accelerate the same from 0-15MPH if you start with "1" selected?

You may also have a bad coil (or two or three). Over the years, I've had similar symptoms on a couple of cars (one 3800 and two Northstar variants) that were instantly cured by replacing the coils.