Car not running 100%

Hello!!
I have a 95 t/a that I've owned for about 1 1/2 years. About a month in a half after buying it, it started acting up.
After replacing the cat.,
tranny, mas, opti, and egr, plugs, wires I finally got it running right. But I noticed that it wasn't as fast as it was before It started acting up, I mean I would barely have to touch the pedal and it would roast the tires... now I have to stab the pedal for the tires to break loose.
It has developed a leak on the passenger side manifod caused by the cat. malfunction that I haven't fixed yet. The leak is at the manifold/block
While accelerating, I notice sometimes rpms seems to drop for a split second then return to normal at around 2000 rpms, like it hit some kind of limiter or something???
Anyone have any ideas????
James
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sounds like your cat. converter may be getting plugged up.

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Man!!!! I just had that thing replaced not to long ago....
interrupt

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This is just a guess but I think you should check the fuel pressure. Your fuel pump might be on its way out.

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Yep. I think that maybe one of the problems.

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