will not start without priming throttlebody

Car: Chevrolet, Blazer S10, 2010, 2.8 - Back to Fix-It

Q.have 1986 s-10 blazer, after changing oil, and filter, airfilter, fuel filter, sparkplugs, and wires, and draining radiator, will not start without priming throttlebody, after starting will idle, and rev, but dies when throttle opened completely.
I have replaced fuelpump, injectors, intake gasket, throttlebody base gasket, throttle position sensor, temp control sensor, accelerator pump, relays, ecm, replaced entire distributor, coil, timing gears, and chain, battery cables, altenator, starter, vacuum lines,3 relays on d/s fender, idle/air controll sensor, I have replaced evrything I can think of that has anything to do with starting, and running. what can problem be?

Answer We need to take a few steps back, and look at a basic on your vehicle.
It runs when primed, but only at idle.
You need to run the engine with a fuel pressure gage on there.
These things will run if the pressure is low, but they will not stay running and usually just trying to bring the RPM up will cause the engine to die if the pressure is low.
You must have a minimum of 9 to 13 lbs of fuel pressure for your year make and engine size.
Back then, GM gave us a Fuel Flow Test and a Pressure Test.
Here's the flow test.
(image removed)
FUEL FLOW TEST
- Disconnect the fuel feed line.
- Apply battery v.. >> login for more

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will not start without priming throttlebody