So last sunday I bought a 91 Firebird Formula 305 TBI. It seemed like a great car and the prev owner had replaced a significant number of engine components. He hadn't driven it in a while and took it out for a drive a few days before selling it to me and it was fine, I drove it on Sunday and then started the 3 hour drive home. Made it 2 and a half hours when the engine just shut off. Didn't sputter, didn't rev up, just died. I towed it to a shop, they said fuel was not firing and it was an issue with the ecm. I towed it home, and the previous owner said to check the VATS and the resistors were not giving the proper resistance, so I replaced that then tried it, It still didn't fire up. I shot some starter fluid in there and it started as long as i kept spraying. I hotwired the ingition hot wire to the fuel injector wires and it started for like 3 seconds. I tried again and it didn't start. I am going home soon and will post to this thread if I am getting fuel pressure at the tb, but I can't hear it priming. I have not checked the relay. I also know that the fuel injectors with click with a 9v battery, but I dont hear it when I try starting it. ask any clearifying questions. Im 17 and new to cars but I am taking autoshop at my highschool (2004 audi a6 engine swap is my current project)

List of things the prev owner replaced:

fuel pump, fuel filter, injectors, tps senor, fuel pressure regulator, injection pod rebuild kit, brake calipers, master brake cylinder, clutch cylinder, rear drum brakes, distributor, wires, plugs, alternator, battery, wheels, tires, front control arms and bushings, tie rods, stabilizers, front struts, rear shocks, steering wheel, ignition lock cylinder, rear tail lights, headlight motors (L), door handles (L side interior) and more

 

If fuel pressure is 10-12, and you have spark it sounds like you do. Pull the ecms prom see if it will blink a noid light or siren the injectors at that point. This forces the ecm into limp home mode. If that fires it up. You need to bypass the vats 1 of 3 ways. tgo