I'm back! My 90 Lumina 3.1 will start and idle, but when I press the accelerator it stalls out. We got it narrowed down to no spark being the problem by spraying fuel directly in the intake at an idle. We tried everything . We checked/replaced the computer, coil packs, ignition module, plugs+wires, crankshaft pos. sensor, throttle pos. sensor, MAP sensor, MAF sensor, and timing chain. Everything is in top condition, but it still stalls when I hit the accelerator. I found a diagram dated in 2000 that shows wiring, and has the numbers 3 and 9 written on it. 3 and 9 are both marked inj. control. could those have anything to do with my problem?

Try to get a fuel pressure check. Sounds to me like you have a dirty fuel filter or dirty injectors. Could also be the in tank "sock" filter.