Is your O2 sensor hooked up?  This sounds like the wire you disconect for the O2
sensor when you are making adjustments to your idle and CO.  Is it located
beneath the coil?
-Tim

Mark McCulley wrote:

> In my '87, there's a single wire, white with a green stripe, in the driver's
> side of the engine compartment that is not connected to anything. The wiring
> diagram in the Bentley manual indicates that this wire goes to the idle
> stabilizer control unit. Anybody know what the purpose of this wire is? Is
> it a test point?
>
> -Mark McCulley