Im new here but have had a lot of success on the honda and harley forums over the years. I have searched the forum here for several hours dancing around my issue but not nailing it down.

I am working on my mothers 95 blazer vortec v6.
I drove it home about an hour away from my moms in november and to work for a couple of days. It was running fine then. It had been sitting for a while before that. It started (surging/bucking/jerking or other choice words) while driving when i would level off and try to maintain a speed. it eventually got worse and wouldnt start without trying a couple of time then it stumbles as you try and accelerate.

Things I have done/replaced:
plugs
wires
cap
rotor
coil
fuel filter

After doing this it ran better for about 30 mins then started again.

I used a inline spark tester to see that I am getting fire at all 6 plugs.
I checked the fuel pressure and noticed that it was a little low. it would jump to around 60 but drop when i tried to start it. sometimes it would start and sometimes not so much. When it was running the pressure would go up and down.

Replaced:
Fuel pump
fuel tank vent valves

checked fuel pressure again and it is holding pretty solid between 60 and 65, but it wont start start on its own. Checked for spark again and it was present. Shooting starting fluid into the front of the intake allows it to start. runs great at idle but still stumbles on acceleration. If i gently and slowly press the accelerator the RPMs will go up and run smooth. put it in gear and again with just slight pressure it will drive and accelerate, but if you want to press on the gas or try and take off stumbles and dies. checked fuel pressure while running and still gets solid 60's high 50's.
With good fuel pressure and Spark this leads me to believe that it may be inside the intake manifold.

Am I missing anything or is it the injectors\assembly?

 

When the injector broke in my 95 jimmy it would only start half the time and the rpms would surge, sometimes it would drive good but it would just quit or bog down if you gave it to much gas. Before I replaced the injector I just about replaced everything, Take a look inside the intake manifold and look and see if there is any signs of it leaking, there was gas in mine on both sides.

 

I'm gonna say take off the upper intake and inspect for leaks