Very High Idle ISV Problem

[JShadzi at aol.com]

The spring holds the MC and turbo ISV closed, if yours is unplugged and open then its likely defective.

Javad

>Please help me to get some basic ISV understanding.  The engine is an MC
>from an '86 5ktq.  A spring keeps the ISV closed when unpowered.  Does the
>solenoid help to keep the valve closed when powered or does it help to keep
>it open (I know it varies in a range)?  I assumed the valve stays closed by
>itself since I've heard of people disconnecting it and having an acceptable
>idle when warm.
>
>Thanks,
>Chris
>
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