Lack of power ...

Now I know there was a thread about this a couple weeks ago, but I need to start my own.

My 96 Tahoe 5.7 (106,xxx miles) has recently had a new fuel pump/filter put in. Even before then, and now, I just feel like I have little power with the truck. I thought maybe i felt a couple missfires, but wouldnt the pcm pick that up and throw a code??? Fuel pressure has been fine though.

Anyway, what are some things maybe I could check for, or have my mechanic check for that could be causing any kind of power drain.

Thanks in advance,
Ryan

I just replaced the cat on mine .Felt like gained power .still has misfire ...

You might have them check the back pressure.I just put on a set of cats on mine.I could feel the difrence.