You can test for power with a simple light bulb. I love corner lights because they are 194 bulbs that have tabs on them you can bend straight to use in a pinch. Ground one side to metal of the car that isn't painted and put the other side to the believed power.
99...no, that's for the resistor trick. He's not getting any fuel at all. When a GTP's fuel system primes, the pump uses high speed (bypasses resistor) and primes the cylinders with the key being turned on. It'll fire up and run for 2-3 seconds then sputter and die as the fuel runs out. It runs out because after prime..the pump would start running on low speed (resistor) once the engine began running.