I would guess it's your combination relay. Do you have a noid light? If not go buy one and plug it into your injector harness. If it flashes it's working. If not the relay or the wiring in between is bad.
By the way 81 Spiders were Spica injected. You must have an 82 setup.
Tom
By the way 81 Spiders were Spica injected. You must have an 82 setup.
Tom