I have an 01 blazer with the vortec v6 4.3L it starts and runs but go to rev it or put it gear and hit the gas it acts like its not getting any fuel. It also seems to heat up alot faster than normal thinking it may have something to do with o2 sensors and the cats being plugged any information would be helpful thanks!

 

Are you getting any codes? Testing the fuel pressure will let you know if you have a fuel issue. Removing the one of the upstream O2 sensors would be a way of diagnosing a plugged catalytic converter.