1995 engine, my issues is with 6&8 injector not firing. I replaced the pigtail and harness same issue but now oil was squirting from the return under the solenoids. Ran tests, solenoids good, wiring good. That tells me it’s a fuel issue. Threw 2 known good injectors in and same issue. Threw 2 brand new injectors in same issue. Compression test good. Within +-5 psi of all other cylinders. Really stumped with this one. Any help would be greatly appreciated.