84 ltd lx, 5.0 SEFI, t-5,
I have noticed that the engine has not been running as good as it should. It seems a little rich when idling in the garage and down on power. The latest issue is when I am in 3rd gear at 3000 rpm when I go full throttle it will back fire once or twice. I pulled all of the plugs and they are all clean. Any ideas?