2000 blazer no acceleration

within the past year my 2000 blazer lt 4wd 98,000 mile put in a fuel pump,fuel filter,plugs,wires,cap,rotor pulled out distributor to check the gear and i was bearly worn i have no codes when hooked up to a mt-2500 .i have no acceleration of the line at start up and in park at start it just bogs and pops. we are all at a lost please send help

What engine?
Good hot blue spark to all plugs?
If you pulled dist you need to check/set camshaft retard setting.
Check engine vacuum reading at idle and at 2K rpm.
Post back reading
If vacuum drops when rpm raised up cat may be plugged.

And always check fuel pressure.
Hard to start cold.
Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure.
Later V6 and V8 gm engines should have 60-66 fuel pressure.
Cold start should be 64-65 lbs of pressure.
If you do not have full fuel pressure on a cold start the injectors will not squirt fuel.
Do not leave home without it.
Engine running should be 60-66 lbs pressure depending on engine load.
Full pressure with return pinched off should be 75-85 or more.
And if it has a fast leak down after shut off you have a leak.
Post back fuel pressure readings.
MT