My '87 Verde has been sitting for a while. When I started it, it ran very badly. I traced it to #5 plug not firing. I have cleaned the contacts inside the cap but have not replaced it. I switched out #4 plug wire for #5 and still it was #5 cylinder that didn't fire, so it doesn't seem to be a wire. Plugs are new. The Bosch pigtail to the injector was cracked so I replaced it. Still no #5. I really don't feel like removing the injectors to see if #5 isn't injecting. Any suggestions?