1991 Chevy Corvette will run if gasoline is spayed. I have replaced plugs, distributor cap, condenser, wires and plugs. Replaced fuel pump, fuel modular, got 39/40 fuel pressure on gauge, test injectors with node lights and was fine and just try a new computer box but still will not start rally frustrated! Thanks

SOURCE: 1989 chevy g20 STALLING

to replicate running condition with module,test module while heating it with a hair dryer or heat gun,if module is bad when engine is warm,it will show up using this method

SOURCE: 89 s10 2.5 has fuel and fire injector has power but no pulse

injector pulse is just controlled by the ecm or computer as some would say,u said u replaced wires? did u have a fire or melt wires? ecm is known to go bad on these,had a few of these trucks back in the day.

SOURCE: 1999 chevy blazer wont start

THE FUEL PUMP IS BAD.

if your losing fuel pressure after the pump runs the drain back valve in the pump has failed.

and i doubt that you are seeing enough fuel pressure to run a vortec engine.

low fuel pressure equals a non running vortec

SOURCE: 1999 Chevy Blazer - idle fluctuates

oil pump might be going bad

SOURCE: i have a 1991 corvette, it wont start. i can start

If there is not fuel going thru Fuel injectors, then it won't start. You can buy NOID lights at any auto store to connect to Fuel injectors to see if there is a problem with Fuel injector module. Here how the NOID lights look like:

http://www.tooltopia.com/index.asp?PageAction=VIEWPROD&ProdID=5334&utm_source=shopzilla&utm_medium=cse&utm_term=OTC3050C&utm_campaign=shopzilla_r1

You plug these into the connectors of Fuel Injectors to check during cranking. If there is light then your Fuel iinjectore Module is Good.
Then there is a problem with the Regulator. Here how it look like.

Testimonial: "very good thank you i will try it"