Would be a good idea to just replace them with new style injectors and the new style connectors soldered in. Be careful when you install the fuel rails back into the lower plenum. Grease them up as the instructions state with the lube they give you.. also put them ON the fuel rails first and then put the rails back into the plenum that will usually prevent any chance of a pinched o-ring...
Also on your FPR, could be a defective unit. Contact Aeromotive and see what they have to say.