When i start up my blazer i have to wait 5 minutes before i can drive it so that it can "warm up". The thing is, its 90 degrees out, so i dont understand why the car needs to warm up! if i dont let it idle before driving, it sputters and bogs down till it stalls when i touch the gas. there are no check engine lights on or anything, so i dont know what the problem is!
Problems:
misfiring, rough idle, stalls, shakes

I was just checking out the thread:
2000 4.3 - misfiring, bad idle, hesitation, rich smell ( 1 2)
Matt 4.3 TBI
Is it possible my truck needs new fuel injectors and spark plugs? my blaze does have 150K miles..

 

I would run throguh the general tune-up / clean-up items. Plugs/wires/cap/rotor for the tune up and clean the MAF sensor, EGR valve, and complete throttle body (including the removal and cleaning of the IAC valve & its bore). All of which should be covered in other threads.