Car runs fine drives great about a week ago I noticed it stopped taking off like it was at first. I could floor it and it would hit 5500 to 6000 and just take off of checked the cat its good at 4000 it just bogs down something terrible any help would be appreciated

 

First things first,what year and model car are we talking about? You haven't even said if it's a V-8 or V-6.

 

Its a 94 v6 3.4L

 

Pulled fuel pump to check screen filter everything is good tank is clean

 

have a look at your plug wires. are they old, if so check under the hood when its dark, try to find a spot where its really dark, start car, open hood and see if you got a light show around your plug wires. if so replace plug wires. probably not a good idea to be revving the 24 year old engine to 6k rpms. I thought the 3.4 had rev limiter. check plugs to make sure they are firing and not fouled. check air filter, maybe clean the maf with some maf cleaner.

 

Plugs and plug wires are brand new the car started acting up after i put a certain gas in it and its only been reved to 6k a couple time accellirating never ment to take it that high

 

My step one would be a exhaust back pressure test. There are a lot of things that can limit RPMs but most will set a trouble code. Since you did not mention a check engine light I assume it is not on. If you play the odds its a plugged cat but a stretched timing chain will cause the exact issue also.

 

Cats good pulled it off an it ran the same just put it back on this morning but no engine codes at all

 

After putting cat back on relized if i rev in neutral it preforns fine but have noticed fuel pump is making a wierd constant wining noisegets louder when accelerating