If you just completely removed the O2 sensors from your truck..... Well that's your problem

 

I removed them a while back, i replaced them and now both are in working order. Please, if you're going to comment make it constructive.

 

Did you completely ignore my posts?!?! ANSWER: NO!

A step in the right direction would be checking your plenum.
It's very unlikely that the MAP sensor is your problem, however checking the specs on it wont do any harm. And I doubt your trucks imaginary MAF sensor is the problem...

Hissing, aka vacuum leak, will also cause running/driveability problems. Check all the vacuum lines coming off the intake, they should be in great condition and be connected to something on both ends. If your missing the gasket between the air hat and the throttle body, it'll also hiss. I would guess since you remove the air hat to look down the TB, you didn't put the gasket back on.

 

Well, my comment is pretty constructive considering you didn't say you replaced them.
You never made any mention of putting them back in, so of course I'll go ape.
It doesn't help that I'm tired too....

 

Pull the pre-O2 sensor leave it out and run it and see if it doesn't get better temporarily of course. I had the exact same symptoms and turns out it was the cat bad...could be you have a host of issues...plenum so bad that it has alread dirtied the new cat???? worth a try

 

I would get another TB gasket and a can of cleaner, pull the TB, give it a good cleaning and look down the keg when you got it off to see for oil pooling.

What do you guys think about using a cell phone charger to check a crank sensor on the bench?

 

I don't have a cat, I haven't checked plenum because I've never done one yet, both my o2s are replaced, brand new charcoal canister that got rid of my po441 code, but still backfires and runs like **** when engine isn't at operating temp. Friend suggests leaking intake gasket. Any suggestions ?