It's a 2 wheel drive 96 chevy burb 5.7 vortex throttle body spider injection system. Truck was running good before replacing spider injections system. Only replaced because started having hesitation issues like my previous truck had just before 2 injection poppets broke and blew head gasket out of blue. So was doing preventive maintenance.
Aanyways the list below tells what's what's.

Got any ideas please could use some directions
list of newSpider injectorPumpFilterRelay and fuseCrankshaft sensor switch male and femaleCoil and coil wireSparkplugs and wiresAlternator battery and compressorNew oil pressure sensor switch female side onlyFuel tank clean like it's newAnd other unrelated stuff new.

So this is what we have doneFuel pressure test good when not plugged into injector system.
Bad when plugged inPump comes on- eliminating by getting a new one with new pump and assembly if continues and can't figure it out.
Tested sparks for plugs wires coil and all good
Battery replaced good.
Spider injection system got one and didn't work so got another. If it doesnt continue to work will try with mini electric style on poppets. Instead of regular poppets.
Have redone the spider injector system 4 times to be sure all connections in proper place including firing order on cylinders and spark plugs wire placement.
Engine is really good and sound only 185k miles on engine.
Looking at replacing possibly throttle body position sensor
Idle position sensor or what ever that other sensor by the throttle body sensor is on side of the throttle body.
And looking into where to get the replacement for the whole wiring harness for the whole engine. Which is becoming a headache because I keep getting pieces not the whole thing.

Will get pics later of wiring harness not main focus right now and is last resort of this.