I like others are experiencing idle problems and I've been following
these threads closely.  I'm looking for simple ways to identify if either
the control valve or the stabilizer is the culprit.  I've ruled out problems
with: plugs, wires, cap, rotor, timing, coil, injectors and fuel filter.   I
have 91 which runs fine but before I start swapping digifant items I'd like
to have an idea were to start.

Is the idle control valve supposed to "hum" with the ignition turned on?
Mine does not.

Is the idle stabilizer supposed to vibrate with ignition turned on?  Mine
does

Thanks, Marcus

91 Carat (taking a long winters nap)
86 GL (the erratic idler)

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