i have a 1969 chevelle that I removed wire harness and installed a harness
from a 1990 camaro 5.0 tune port
with computer and steering coulmum
here is the problem
it will crank and i have spark and plenty of fuel preasure
injectors won't fire i have noid lights on them no signal
all fuses are good
i put fuel into the air intake and it comes to life please help

 

The PCM fires the injectors by putting a ground on one of the injector leads. The 1990 uses batch fire, which means that the ECM fires all the injectors on one bank at once, an then fire the other bank. The ground applied by the ECM is isolated from the chassis ground, but the ECM housing has to be properly grounded to chassis for it to work properly.