Miata Mailing List: September 1995, Message #215


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   From: russotto@pond.com
Subject: Re:  Cold-start idle
   Date: Wed, 6 Sep 1995 08:21:13 -0400


Your dealership probably screwed up the idle speed.  1700rpms is way too
high.  The idle is realy easy to adjust -- connect a jumper between
GND and TEN on the diagnostic connector on the driver's side of the engine
compartment.  Then adjust the idle to 850 RPMS or thereabouts, by turning
the idle air adjustment screw which is under a little rubber cap on top
of the throttle body.
 
For some reason, even when the idle is badly maladjusted, it will often
seem OK with the jumper disconnected -- maybe the jumper disables the idle
control system among other things.
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