I have a 93 4.3L Camaro sedan with mystery problems. All dealership computer codes have been eliminated, parts replaced, wiring redone, etc. but she still runs rough after about 10 mins of warming up. The dealership and another mechanic are all totally mystified. The problem "feels" as though she's being starved of gas intermittently. Occasionally there's a smell of hot electrical wires (thus all of the rewiring work). Has anyone every encountered anything like this or any suggestions? No recall or repair reports have been located as yet.