I have a 2000 Stang v6 3.8. I've been trying for 6 months to figure out the problem I'm having with it missing. I've replaced plugs and wires twice, coil pack, intake gasket, fuel filter, and the obvious other things. I'm thinking now that there's an injector that's bad. The #5 cylinder is not hitting leading me to believe that #5 fuel injector is clogged or bad but the shop said they're all working. Help! Could it be the ECU?