05 ZR2, loses power consistently
 

I've had my Blazer for just over 3 months and for the last little while I've been having issues with it just totally bogging out and losing power. Check engine codes for MAF and O2 sensors (02 sensors only after using deep creep in my throttle bid) Tried cleaning the MAF and nothing. I was told it could also be fuel pump or fuel spider (?). Any ideas? Usually doesn't happen until I push past half throttle but also when I first start it up about 60% of the time.

also forgot to mention, one time it happened just after start up the truck completly shut off. It was fine after turning it over again.

Sounds like my last pump,do fuel pressure leak down test and it'll show you for sure if it is.

I'm not super savy with all this, how can I do that/find instructions?

Rent tool from local parts store. Give them a down payment and when you bring it back they should give you 100% of your money back. there should be a screw on nozzle (kind of like for puting air in your tires) on your fuel lines on the top of the engine. put it on there and turn the key. Ask them at the parts store to help you, its not very hard and doesnt take long so they may help you right in the parking lot.