Problem with PMO/ITBS Injectors?Fuel?

[Geneman]

Seems simple but i cannot figure it out......
backstory: after getting my fulll tuned Tech3r PMO-ITB system back fro Dawe...

went to start this am will not catch at al!!

backstory.. i had ran the thing dry: tank, injectors, fuel pump… etc i did not realize dawe used up all the gas .. so it was a dead tank hence i certainly pumped air into system

so filled tank, ignition and fuel pump on.. it pressurizes system as i can see the mechanical gauge go up to pressure on engine after just turning on ignition… however when pump stops… guage falls back to zero.. is this correct?

so when i then crank it with starter button, fuel pressure rizes again..but it does not start just cranks trys a catch a bit then i get a huge backfire explosion…


first: is it correct to have no fuel pressure on gauge when not cranking?.. seems like system should stay pressurized. i am getting fine return fuel into the tank.. which i checked when pump is on so no blockage in system.

second.; when cranking with engine after fuel pump :" pressurizes" should i be seeing/smelling gas in the throttle bodies being injeected ? even after crankin i do not seem to see or smell gas in the throttle bodies.. when i hold the butterflys open


so if that is case why would injectors not be working? do they need any kind of priming after being air dried?

what should i check if injectors not working.? i do no feel its a fuel delivery problem to the motor itself unless pump/system should be holding pressure.

thanks for your help desperate going to track tonmoorw

frank
btw should i remove one injector ground it and see if it is spraying gas while cranking?