[Shotimes] 89 SHO Idle Issues - Help Please

[Alan Fanning]

I have a batch of 1/4" drive, ball-head, 5mm allen wrenches I made up that
work nicely for this job (in combination with a short extension). They also
work well for adjusting the MTX accessory belt tension and other 5mm socket
head applications. $10 delivered, or trade for a steel '94-on caliper piston
in good shape.

    Alan

PS. If you slot the bottom hole of the ISC when installing a new one,
they're a piece of cake to install (and remove later).

    Alan

> It not bad if you use a 5" long 3/8" drive allen wrench. With an extension
> on the allen place the wrench under the snakes add another short extension
> and ratchet away. Use some never-seize on the bolt when replacing.
>       Ken
> 
>> My instinct is that the problem will be an Idle Speed Control valve fault
>> (or its associated electronics from the PCM).  The ISC costs about $55
> from
>> AutoZone and is not too terribly difficult to replace.  Well, that bottom
>> screw is - it takes a LOT of Allen wrench repositioning.  AZ refers to it
> as
>> the "Throttle Air Bypass" valve.