Mazda Miata: Idle Drop Problem when A/C comes on

>Just within the last week or so the idle speed 

Hi
I was having same problem. Here is what I think fixed it. There is a unit
called the ISC valve.....it has an electrical connection at the bottom of the
throttle body to the right hand side of the ISC valve. It can be tested for
ohms. Ohms should read between 11 adn 14 ohms.

Mine was dead. I got another online at Mazmart.com for about $120 (used) and
viola, the rpms now go back up when AC is running.


~Cissy
<a href="http://members.aol.com/IvaMiata/Krikkit/index2.html">My '90 Mazda
Miata</a><br>
<i>I love PC adventure games</i>

My RPM comes back up to a good level.
My concern is the much greater drop in RPM,
almost to the point of stalling, before it
returns to the higher normal level with the
A/C engaged.

Will check your suggestion as possible cause.

Thanks,
Denny



Expmiata wrote: 

>My RPM comes back up to a good level. 

ok, good luck. Perhaps I misunderstood the problem.
~Cissy
<a href="http://members.aol.com/IvaMiata/Krikkit/index2.html">My '90 Mazda
Miata</a><br>
<i>I love PC adventure games</i>