'88 Z-24 2.8 multiport has a steady miss at idle, but it seems to go away as soon as it throttles up above idle speed.
I suspected a coil pack and changed it but that didn't change the way it runs.
When an injector goes bad, is that the way they behave? Or do they just suddenly go dead altogether? I did run a bottle of STP injector cleaner through in a tankful of gas, didn't change anything. Can an injector pass the resistance test but still be bad?