Could be a low pressure fuel pump or a bad injector.

 

ill have to check those things i just changed out the tps .. i have the truck idling at 1200 rpms in park will not go down and 600 to 700 in drive .. is that meaning my iac is bad ? also looking at my i ac when i pulled it off the motor it looked to be fully extended ab out almost an inch extended .. should it be like that or should it be sunk back in all the way

 

Depends if the engine is hot or cold

 

it was cold

 

My friends dad has a 2001 chevy who had similar issues. I sounds like it has to get warm to have any power, this is the issue he had, after 6months with the college auto tech class test the pcm and all the other stuff you said they had nothing. My friend took it back home and the truck finally threw a code. Sounded like the cats were plugged, checked them out that wasn't it. Finally he checked th O2 sensors. One had a broken tip, two other tested open, and only the last one was good. The truck never threw a code for the O2 sensors, I would look into it if I were you.

 

Is the fuel pump or injectors common cause for sluggish acceleration?
I was driving around yesterday, the weather was nice here in Oregon, wow lol and it sounded horrible... I think I may have caused something... I think this started when I looked at the TB, didn’t touch it just checked it out, short time after the problem at hand started... Maybe?
Will check the injectors. Thanks Hydra.

 

well it would appear i fixed the problem .. the bank 1 o2 sensor was reading rich and switching and sticking forcing my truck to run in a "retard mode" now i face the ticking .. that i discovered it was an exhaust leak no to track it down lol .. thanks to all who gave me some insight