We have an 84 T-Type that is not getting any spark. We've check the cranksensor and it's getting juice but the injectors are not. The coil is getting power but not firing. Would this be an ECM problem or something else? There are no trouble codes given via the SES light. It blinks for code 12 but no other codes. What is a good source for finding a used 84/85 ECM aside from eBay?