91camaro 3.1 wont start

your testing is no good. (no engine told at all)
the ECM ,only injects using this logic.,

1: fuses good
2: ECM good (i bet yes)
3: CKP and CMP senors dead.
4: if the ECM sees spark dead it cuts all fuel to prevent as seen on TV "CRASH AND BURN" and by LAWs on this fact.
5: some cars have Injector buffer modules between ECM and injector rails.(LOOK OR READ THE FSM)
6: fuel pump dead.
7: fuel filters clogged or it and injectors too (they have 10micron screens)
8: have a NOID light? to see if injectors are not fired by ECM?
the injector plugs all have 12vdc on one pin, do they if not fuse blowN, #1 AGAIN.. USING A DMM, METER.

mostly this list works too BELOW.. (noid lamp fails)
fuses
ckp and or CMP sensor dead. The crank and cam must spin !!!!
if CMP is dead and cam does not spin, well that be cam drive dead.

spark dead, if spark is dead ECM detects it dead and fueling is banned,(blocked)by laws. (fire avoided , win)
way3:
if NOID passes on all injectors (as will spark tests)
fuel pressure gone. we measure it. (bad pump, clogs or bad fuel)

if spark is good test fuel test works.
ever do test fuel on any engine using can-o-fuel or instant start fuel in a spray can, seen engine run for 3 seconds and sounds good.?
RTM FIRST? there are sure more causes, list is common, only. and hard logic truths.

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CHECK SPARK PLUGS AND TIMING ~~( ALSO TUNE UP DISTRIBUTOR CAP, EGR, O2 SENSOR) , VACUUM WILL CAUSE LOOPS BUT WONT CUT CAR OFF

Are you getting power to the injectors and a ground signal from the computer ?

Try a little starting fluid in the intake (not too much, just enough to test). If it takes off for a second or so, may be water in gas. Ten months old? It should be alright, unless it's loaded with water.

ask a local mechanic to have a look ,you may have left a power supply cable off from the positive terminal ,as for the non start then check for a spark and if a spark then check the fuel pressure it should be 55lbs on the injector rail is a tyre valve looking connection check the fuel pressure here

did you check the fuel pressure pump on the frame rail for power and ground? have you verified no ignition spark to the spark plugs? have you checked for fire from the coil to the distributor cap? does the check engine light come on when you turn the key on? have you check for injector pulse and power at the fuel injectors? if the fuel pump won't come on and you have no ignition fire and no injector pulse, all of these systems are triggered by the ECM.

There is a sensor under the left hand side of the dash that would not allow it to start, provided that you have replaced the electronic spark module inside the distributor first, which is what it sounds like it would be, When you say you replaced the distributor I assume you replaced it complete!

1 Inspect Battery Battery Discharged or Faulty. 2 Inspect Battery Cable Corroded, Broken, Shorted or Poorly Connected Battery Cable. 3 Inspect Distributor Cap Distributor Cap Cracked or Burned. 3 Inspect Fuel Filter Clogged or Dirty Fuel Filter. 5 Inspect Coil - Ignition Faulty Ignition Coil. 6 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s). 7 Inspect Spark Plug Incorrectly Gapped or Fouled Spark Plug(s). 8 Inspect Starter Starter Motor Faulty. 9 Inspect Fuel Pump Low Fuel Pressure. 10 Inspect Solenoid Switch Faulty Starter Solenoid Switch. 11 Inspect Relay - Fuel Pumpat Faulty Fuel Pump Relay. 12 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator. 13 Inspect Ignition Switch Improperly Connected or Faulty Ignition Switch. 14 Inspect Starter Drive Faulty Starter Drive. 15 Inspect Fuel Injector Dirty or Worn Fuel Injectors. 16 Inspect Fuel Pump Strainer Clogged or Dirty Fuel Pump Strainerat. 17 Inspect Engine Control Computer Incorrect Operating Information Being Delivered and Sent From The EEC. 18 Inspect Fuel Tank Fuel Tank Empty. 19 Inspect Carburetor Carburetor Flooded or Faulty Choke. 20 Inspect Distributor Worn, Loose, or Incorrectly Installed Distributor.

Fuel pressure? Do you hear the fuel pump running? Read the codes to see if ECM is still alive. Do you have spark at the plugs? Remember all motors need 3 things to run air, fuel, and fire at the right time.

sometimes it is the ecm which is the computer that goes bad and can no longer sends signals to the starter to turn over. sometimes could be the firing order or timing. check these things out.