i bought a 1995 gts noticed it had a slight miss at low rpms.header pipe #6 wasnt as hot at start up as the rest.checked and replaced plugs. wires. same problem.cruising at a constant speed the car humps.took the plug out of #6 and car runs the same.was told maybe an injector bad.replaced them also .no luck! removed the heads and #6 valves are wet and the same color