Miata Mailing List: August 1997, Message #171
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From: 	PDFix@aol.com

Subject: Re: Idle speed adjustment

Date: 	Sun, 3 Aug 1997 08:20:04 +0000



Barry / list,



I've been battling the "RPM-dip-as-the-car-slows" problem for quite some

time.  I've also adjusted the idle (up a tad);  changed plugs, wires, air

filter, etc..  The RPM dips, but the car has NEVER stalled.  It is most

noticeable w/ the clutch depressed, or, when in reverse with the clutch

depressed (try it).



I live in California (reformulated gas).  The ONLY thing that seems to work

for me, despite everything I've read in Miata Mag, etc, is 92 octane gas!

 The car almost never suffers the RPM-drop on high octane. But that's not the

best fix, obviously.



None of the above helps you with whatever ails your idle speed adjustment

screw-- sorry! But, if you fix the overall idle-drop problem, please email me

with the solution.



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From: "Barry J. Bolling" <bbolling@netdepot.com>

Subject: Idle speed adjustment

Date: Thu, 31 Jul 1997 17:14:54 +0000



It seems that my idle speed adjustment does not work anymore. I did an 

oil change a week ago, and my idle speed has been "dipping" below 500 

rpm when I let my foot off the gas as I come to a stop. I am stuck at approx

850 rpm, but I'd like it just a tad higher. I turned it all the way clockwise

and it had virtually no effect. What is my problem?



Thanks,





Barry

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-Paul Fix

-92 "C" HT