i rebuild my 94 camaro m6 lt1 and the injector are not firing at all as a new opti and deltec i have lt1 edit i read the codes the only one i get is open fan 1 failure i try using a vat bypass and nothing i try a used pcm from ebay still nothing check wires to the pcm all was good. check schrader valve and push with a key and fuel shot out. put a volt meter to the injector and no pulse. is there any thing that could not be hook up that would cause this. thanks help is needed.